a police car is located 40 feet to the side of a straight road. a red car is driving along the road in the direction of the police car and is 200 feet up the road from the location of the police car. the police radar reads that the distance between the police car and the red car is decreasing at a rate of 80 feet per second. how fast is the red car actually traveling along the road? the actual speed (along the road) of the red car is feet per second

Answers

Answer 1

The actual speed (along the road) of the red car is 81.6 feet per second

What is Pythagoras' theorem?

The square of the hypotenuse side in a right-angled triangle is equal to the sum of the squares of the other two sides, according to Pythagoras' theorem.

Refer to the figure attached.

[tex]z^2=y^2+40^2[/tex]

[tex]z^2=y^2+1600[/tex]

Differentiate with respect to time 't'

[tex]D(z^2)=D(y^2)+D(1600)[/tex]

[tex]2zD(z)=2yD(y)+0[/tex]

[tex]zD(z)=yD(y)[/tex]

Now, y=200,    [tex]z^2=200^2+40^2[/tex] , [tex]z^2=41600[/tex],  [tex]z=203.96[/tex]

D(z)=80.

Substitute the known values into the equation below:

[tex]zD(z)=yD(y)[/tex]

(203.96)(80)=200 D(y)

On simplifying, D(y)=81.6  feet per second

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A Police Car Is Located 40 Feet To The Side Of A Straight Road. A Red Car Is Driving Along The Road In
Answer 2

The actual speed (along the road) of the red car is 81.6 feet per second

What is Pythagoras' theorem?

The square of the hypotenuse side in a right-angled triangle is equal to the sum of the squares of the other two sides, according to Pythagoras' theorem.

Refer to the figure attached.

[tex]z^2=y^2+40^2[/tex]

[tex]z^2=y^2+1600[/tex]

Differentiate with respect to time 't'

[tex]D(z^2)=D(y^2)+D(1600)[/tex]

[tex]2zD(z)=2yD(y)+0[/tex]

[tex]zD(z)=yD(y)[/tex]

Now, y=200,   [tex]z^2=200^2+40^2, z^2=41600,z=203.96[/tex]  

D(z)=80.

Substitute the known values into the equation below:

zD(z)=yD(y)

(203.96)(80)=200 D(y)

On simplifying, D(y)=81.6  feet per second

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A Police Car Is Located 40 Feet To The Side Of A Straight Road. A Red Car Is Driving Along The Road In

Related Questions

The first three terms of an arithmetic sequence are as follows.-26, -19, -12Find the next two terms of this sequence.-26, – 19, -12,

Answers

[tex]The\:next\:terms\:are:-5,\:and\:2[/tex]

1) Given that we were told that the first three terms of this Sequence. Let's find the common difference:

[tex]\begin{gathered} -26+7=-19 \\ -19+7=-12 \\ d=7 \end{gathered}[/tex]

2) Based on that, we can do the following to find the next two terms:

[tex]\begin{gathered} -26+7=-19 \\ -19+7=-12 \\ -12+7=-5 \\ -5+7=2 \\ \\ -19,-12,-5,2 \\ Or \\ \\ a_4=a_1+d(n-1) \\ a_4=-26+7(4-1) \\ a_4=-26+21 \\ a_4=-5 \\ \\ a_5=-26+7(5-1) \\ a_5=-26+7(4) \\ a_5=-26+28 \\ a_5=2 \end{gathered}[/tex]

Thus, the next terms are -5 and 2

A company prices its tornado insurance using the following assumptions:
• In any calendar year, there can be at most one tornado.
• In any calendar year, the probability of a tornado is 0.04.
• The number of tornadoes in any calendar year is independent of the number of tornados in any other calendar year.
Using the company's assumptions, calculate the probability that there are fewer than 2 tornadoes in a 14-year period.Round your answer to 4 decimals.

Answers

The correct answer is 0.4834

There can only be one tornado every year on the calendar. This indicates that there are only two conceivable outcomes of the event: either there will be one tornado or none at all.

The likelihood of a tornado in any given year is 0.14. This indicates that an event's chance of occurring is fixed. p = 0.14

The frequency of tornadoes in one year is unrelated to the quantity in other years. This indicates that the incidents are unrelated to one another.

The likelihood that there won't be more than two tornadoes in a 12-year period has to be calculated. This indicates that the number of trials, n, is set at 12.

p = 0.14

q = 1 - p = 1 - 0.14 = 0.86

n = 12

x = 2

We need to find: P( x < 2)

Fewer than 2 tornadoes means either 1 or 0 tornado. So,

P(x < 2) = P(x=0) + P(x=1)

the likelihood of less than two tornadoes occurring in a 12-year period is 0.4834

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(X-3)^2=5 to 3 significant figures

Answers

The solution to the equation is x = 5.24

What are expressions?

Expressions are mathematical statements that are represented by variables, coefficients and operators

How to evaluate the expression?

The equation is given as

(x - 3)^2 = 5

Take the square root of both sides

So, we have

x - 3 = 2.24

Add 3 to all sides of the equation

So, we have

x = 5.24

Hence, the solution is x = 5.24

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In Salt Lake City, it is 8˚ colder than it is in Houston. What's the temperature in Salt Lake City? the Houston degree is 8

Answers

The temperature in salt lake city will be 0° Celsius.

What is temperature?

Temperature tells us about the degree of hotness or coldness of a body. According to the thermodynamics, temperature is a measure of the average kinetic energy of the atoms or molecules in the system.

Given is Salt Lake City where it is 8˚ colder than it is in Houston.

The degree of coldness on Celsius scale increase as the temperature tends to negative values and degree of hotness on Celsius scale increase as the temperature tends to positive values. The temperature in Houston is Celsius. Since, the temperature is 8 degrees colder, we will subtract 8° from the temperature value in Houston. Therefore, temperature in salt lake city will be -

T[S] = + 8 - 8 = 0° Celsius

Therefore,  the temperature in salt lake city will be 0° Celsius.

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It takes 0.5 gallon of cream to make 1 pound of butter.


How much butter could you make with 0.25 gallons of cream?

How much cream would you need to make 2.5 pounds of butter?

Answers

Question 1) 0.5 pounds of butter

Question 2) 1.25 gallons of cream

[23+4x(2+5)<15-5x(8-7)]2^5

Answers

Answer:

[tex]23+4x(2+5)<15-5x(8-7)]2^5[/tex]

a school Liberian ordered new books for the library of the new books covered 1/3 are science 2/5 are biography,and the rest of the books are friction. what fraction of the books ordered are fiction?

Answers

Given that of the new books the new books the new liberian ordered;

-1/3 are science

-2/5 are biography

Let s, b and f represent the fraction of science, biography and fiction of the new book.

[tex]s+b+f=1[/tex]

substituting the values of s and b given;

[tex]undefined[/tex]

Louises saving change by -9 dollars each time she goes bowling in all a change by -$99 during the summer how many times did she go bowling in the summer

Answers

Answer:

11 times

Step-by-step explanation:

-99/-9=11

Find the circumference of each circle round answer to the nearest tenth

Answers

Answer: ask your teacher

Step-by-step explanation:u have to multiply

1/2x+1/2+1/2x+1/2?



PLEASE HELP!​

Answers

Answer:

X+1

Step-by-step explanation:

x+1

What is an equation in point-slope form for the line perpendicular to y =-5x - 14 that contains (10, -4)?

Answers

keeping in mind that perpendicular lines have negative reciprocal slopes, let's check for the slope of the equation above

[tex]y = \stackrel{\stackrel{m}{\downarrow }}{-5}x-14\qquad \impliedby \qquad \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array} \\\\[-0.35em] ~\dotfill[/tex]

[tex]\stackrel{~\hspace{5em}\textit{perpendicular lines have \underline{negative reciprocal} slopes}~\hspace{5em}} {-5\implies \stackrel{slope}{\cfrac{-5}{1}} ~\hfill \stackrel{reciprocal}{\cfrac{1}{-5}} ~\hfill \stackrel{negative~reciprocal}{-\cfrac{1}{-5}\implies \cfrac{1}{5}}}[/tex]

so we're really looking for the equation of a line whose slope is 1/5 and it passes through (10, -4)

[tex](\stackrel{x_1}{10}~,~\stackrel{y_1}{-4})\hspace{10em} \stackrel{slope}{m} ~=~ \cfrac{1}{5} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-4)}=\stackrel{m}{ \cfrac{1}{5}}(x-\stackrel{x_1}{10}) \implies {\large \begin{array}{llll} y +4= \cfrac{1}{5} (x -10) \end{array}}[/tex]

Suppose the sequence 28, 14, ... is geometric.

a)Determine the common ratio.

b) List the next 3 terms in the sequence. Explain your reasoning.


please help me!!

Answers

Answer:

see explanation

Step-by-step explanation:

(a)

common ratio r = [tex]\frac{a_{2} }{a_{1} }[/tex] = [tex]\frac{14}{28}[/tex] = [tex]\frac{1}{2}[/tex] = 0.5

(b)

to find the next term, multiply the previous term by r = 0.5

14 × 0.5 = 7

7 × 0.5 = 3.5

3.5 × 0.5 = 1.75

the next 3 terms in the sequence are 7 , 3.5 , 1.75

⇒In a geometric sequence to find the common ratio(r) we use the formula

[tex]r=\frac{T_{2} }{T_{1} }[/tex]

But in general we use the formula is [tex]r=\frac{T_{n+1} }{T_{n} }[/tex]

In this case we are going to use

[tex]r=\frac{14}{28} \\r=\frac{1}{2}[/tex]

⇒The common ratio of the sequence is [tex]\frac{1}{2}[/tex], to get the 3 consecutive terms you are going to multiply the current term by the common ratio which in this case is [tex]\frac{1}{2}[/tex]

[tex]T_{3} =T_{2} * r\\\\T_{3}=14(\frac{1}{2} )\\T_{3} =7[/tex]

[tex]T_{4} =T_{3} *r\\T_{4}=7(\frac{1}{2} )\\T_{4}=\frac{7}{2}[/tex]

[tex]T_{5}=T_{4} *r\\T_{5}=\frac{7}{2} *\frac{1}{2} \\T_{5}=\frac{7}{4}[/tex]

If you have any questions ask me as soon as possible.

GOODLUCK!!

The answer to x/-2+1>4

Answers

Answer: x < -6

Step-by-step explanation:

1) Bring 1 to the other side

x/-2 > 3

2) Bring -2 to the other side. The sign flips when the number multiplied or divided is negative

x < -6

You have 8 nickels, 5 dimes, 6 quarters and 4 pennies. How much money do you
have?
$2.49
$2.44
$2.54
$2.59

Answers

I think it’s C because the coins equal 244 cents and a dollar is 100 cents but I could be wrong

Jenny wants to buy a new dress for her first school dance. She borrows $25.63 from her sister to help pay for the dress. Then Jenny earns $16.33 helping her dad organize his home office. If she gives all the earnings to her sister, Jenny will still owe her sister $ .

Answers

Jenny will owe her sister $9.30

Answer:

Jenny owes her sister 9.3 dollars.

Step-by-step explanation:

23.63 - 16.33 = 9.3

You toss a coin and roll a number cube. Find P(heads and an even number)
1- 1
2- 1/12
3- 1/6
4- 1/4

Answers

The probability of a head and an even number is 1/4.

What is probability?

Probability is the occurrence of a certain event out of the total events than can occur in a given context.

Given event is a coin is tossed and then a die is rolled.

∴ The sample space (S) is = (H,1), (T,1), (H,2), (T,2), (H,3),(T,3), (H,4), (T,4), (H,5), (T,5), (H,6), (T,6).

So, the number of sample spaces N(S) = 12.

The number of heads and an even number N(H,E) = 3.

∴ The probability of a head and an even number is = N(H,E)/N(S).

= 3/12.

= 1/4.

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(8d+4)⁰
(6d+8)°
3. Find d. Show a picture of your work.
d =
pic goes here (or ok to type your steps)

Answers

Answer:

d=12

Step-by-step explanation:

8d+4+6d+8 = 180 (Straight angle = 180)

14d+12=180

14d=168

d=12

:]

Answer:

D =12

Step-by-step explanation:

8d+4+6d+8 =180 (being a linear pair)

14d+12=180

14d=180-12

14d=168

d= 168/14

d=12#

What is 955 divided by 36 rounded to the nearest tenth?

Answers

26.5
26.52 ( you would round the two down)

A department store is selling 3 pairs of socks for $5. Mrs. Wagner want to buy a dozen pairs. How much will this cost?

Answers

12/3= 4 4 x5 = 20 therefore the answer is $20
One dozen. = 12. You also know 3x4=12. Multiple 5x4 to get $20.

classify as =1 , <1 , >1 . for n>1.
|1.1n|

a. <1

b. >1

c. =1

Answers

The value of the absolute value expression given; | 1.1n | for n > 1 as required in the task content can be classified as; Choice B; >1.

What is the best classification of the expression | 1.1n | for n > 1?

It follows from the task content that the best classification of the expression | 1.1n | for n > 1 be determined.

Since the domain of variable n is such that n > 1, it follows that 1.1 × n > 1.1.

There, it follows that; 1.1n > 1.1 > 1.

By definition; The absolute value |n| of any real number n is the non-negative value of x irrespective of its sign. For instance, the absolute value of 15 is 15, and also the absolute value of −15 is also 5.

Hence, the absolute value sign; | 1.1n | indicates positive values.

Ultimately, the correct classification of.the expression is; Choice B; > 1.

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You run $2\frac{1}{2}$ miles as a part of an exercise routine. you run $\frac{1}{3}$ of that distance on a hill. you run down a slope for the last $\frac{1}{2}$ of the hill. on how many miles of your run do you run down the slope?

Answers

Given,

Total distance [tex]=2\frac{1}{2}[/tex] miles

You run 1/3 of that distance on a hill.

Distance on a hill[tex]=\frac{1}{3} * 2\frac{1}{2}[/tex] miles

You run down a slope for the last 1/2 of the hill=[tex]\frac{1}{3} * 2\frac{1}{2}*\frac{1}{2}[/tex] miles[tex]=\frac{5}{12}[/tex] miles

Distance you run down the slope [tex]=\frac{5}{12}[/tex] miles

Solve it please
Iwhdhehehdhdh

Answers

Hello!

To evaluate h(3)

 ==> must plug '3' into x's position in the equation:

    [tex]h(3)=3^2-4(3)+5\\h(3)=9-12+5=2[/tex]

Hope that helps!

Answer:

2

Step-by-step explanation:

substitute 3 for the x

3²-4(3)+5

9-12+5

2

A father and a son go hunting. The father kills an average of 2 animals every 5 shots and the son kills one animal every 2 shots. If the two fired at the same animal at the same time, what is the probability that they will obtain kill?​

Answers

The probability that the father and son will obtain a kill if they both fired at an animal the same time is 0.9

What is the probability of an event?

The probability of an event is the likelihood of the occurrence of event.

The average number of animals the father kills every 5 shots he takes = 2

The average number of animals the son kills every 2 shots he takes = 1

[tex]Probability = \dfrac{Number \ of \ required \ items}{Number \ of \ possible \ outcomes}[/tex]

Which gives:

The probability that the father kills an animal = [tex]P(F) = \dfrac{2}{5} = 0.4[/tex]

The probability that the son kills an animal is; [tex]P(s) = \dfrac{1}{2} =0.5[/tex]

The probability that if the father and the son fires at the same animal, the probability that they will obtain a kill, which is the probability that the animal is killed , P(A) = The probability that the father kills the animal + The probability that the son kills the animal

P(A) = P(F) + P(s) = P(F) ∪ P(s)

Which gives: P(A) = 0.4 + 0.5 = 0.9

The probability that the animal will be killed is approximately 0.9

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Expand & simplify
(
x
+
3
)
2
(
2
x

5
)

Answers

Answer:

4x²+2x-30

Step-by-step explanation:

(x+3) 2(2x-5)

(x+3) (4x-10)

4x²-10x+12x-30

4x²+2x-30

Tommy deposited $2,000 into a savings account that earns 5% interest per year. What
equation would be used to determine how much money Tommy has after x number of years?

Answers

Answer:

7A, 8D

Step-by-step explanation:

The compound interest formula is as followed

[tex]A = P(1+\frac{r}{n} )^{nt}\\[/tex]

A = accumulated amount

P = principle

r = interest rate

n = compounding

t = time

The accumulated amount is represented by f(x).

The principle is the amount of money you start with. In this case Tommy starts with 2000 dollars. P = 2000

The interest rate is 5%. This needs to be converted into a decimal.

5% = 0.05 = r

The money is compounded annually, thus n = 1.

The time is represented by x. x = t.

thus

[tex]f(x) = 2000(1+0.05)^{x}[/tex]

After six years, you simply find f(6), or substitute 6 into x.

f(6) = 2000(1.05)^6 = $2,680.19


Question 8
g Principal (p) = 1500, Rate (r) = 7%, Time (t)
= 8 years. Calculate the Interest.
n
et A.
C.
$840
$2,340
B.
D.
$1200
$660

Answers

[tex]~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\dotfill & \$1500\\ r=rate\to 7\%\to \frac{7}{100}\dotfill &0.07\\ t=years\dotfill &8 \end{cases} \\\\\\ I = (1500)(0.07)(8) \implies I = 840[/tex]

I need help in math can you please help me

Answers

[tex]G)I_{\text{ }}and_{\text{ }}IV[/tex]

That's it, do you have any question about the answer? my ple

Pleasehelp Name the reciprocal

Answers

Answer:

x = 12

Step-by-step explanation:

3/4x = 9

x = 9/1(4/3)

x = 12

How would i solve for X?
Please help!

Answers

Answer: 49 degrees

Step-by-step explanation:

130+99=229

229-180=49

49 degrees

180 degrees is a straight line

What is the length of side AC of the triangle? A=6x + 7 B= 5x + 5 C = 7x - 1

Answers

ok it literally shows on the figure the length of the side AC is 6x + 7.

Answer:

AC = 25 units

Step-by-step explanation:

since ∠ A and ∠ C are congruent then the 2 legs BC and AB are congruent

BC = AB ( substitute values )

7x - 1 = 5x + 5 ( subtract 5x from both sides )

2x - 1 = 5 ( add 1 to both sides )

2x = 6 ( divide both sides by 2 )

x = 3

Then

AC = 6x + 7 = 6(3) + 7 = 18 + 7 = 25

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