Answer:
I think the answer is 11.20 am
The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)4t. There are 50 bacteria present initially and a biologist wishes to find out how many hours will elapse until there are 10,000 bacteria present. What is the exact value for the number of hours elapsed, t, in the equation 10,000 = 50(10)4t?
Answer:
t = (log200)/4 hours
Step-by-step explanation:
10,000 = 50(10)^(4t)
Divide both sides by 50
200 = 10^(4t)
Take the log of both sides
log200 = 4t
Divide both sides by 4
(log200)/4 = t
t = (log200)/4 (exact answer)
t ≈ 0.575257498915995 (numeric approximation)
Patricks family spent 2 hours and 30 minutes driving home they arrived home at 10:00 pm what time did patricks family leave? HELP QUICK TAKING A TEST
Find an equation for the inverse of each of the following relations. 1 y=-8x + 3. 
Answer:
given
y=-8x+3
Interchanging the role of x and y
x=-8y+3
x-3=-8y
y=(3-x)/8
Inverse is y=(3-x)/8 or y=-(x-3)/8
40,000 mm = ? M plsssssssss help plsss plsss plss
Answer:
40 Meters
Step-by-step explanation:
What is the volume of the rectangular prism?
Can someone please help me I will mark u brilliant
Answer:
According to the histogram, the data points from 15-29 would be 12.
Step-by-step explanation:
No explanation needed.
Answer:
12
Step-by-step explanation:
Add the number of data points that are greater or equal to 15 (4+2+6) = 12.
David has $40 in his savings account. Every week, he deposits $3. Perla has $25 in her account. She deposits $6 every week. After how many weeks will David and Perla have the same amount of money?
Answer:
at 5 weeks
Step-by-step explanation:
y = 3x + 40 (David)
y = 6x + 25 (Perla)
since both equal 'y' we can set the expressions equal and solve for 'x'
3x + 40 = 6x + 25
subtract 3x from each side to get:
40 = 3x + 25
subtract 25 from each side to get:
15 = 3x
15/3 = x
5 = x
6th GRADE, PLS HELP ME WITH THE IMAGEEEE
Answer:
y=7x
Step-by-step explanation:
Take two points from the line and plug them into y2-y1/x2-x1. In this case, I chose (6,42) and (7,49). This will make the equation 49-42/7-6. This is equal to 7/1 or 7. Therefore, the equation is equal to y=7x.
If this helps please mark as brainliest
Step-by-step explanation:
6x7=42
7x7=49
8x7=56
9x7=63
Please help
Kari walked a total of 10 kilometers by making 5 trips to school. How many trips will
Kari have to make in all to walk a total of 16 kilometers? Assume the relationship is
directly proportional.
Answer:
8
Step-by-step explanation:
10÷2=5
16÷2=8
so then it means it is 8
A boat travels 120 miles with the current down the river in less time than it takes to travel 80 miles against the current up the river. The boat makes the entire trip in 12 hours. The speed of the boat, without the current, remains constant at 20 miles per hour what is the speed of the current.
Answer:
180 miles is answer
cuz it takes 80 miled to travel in 12 hours
Answer:
The speed of the current is 10 mph
Step-by-step explanation:
x= speed of the current
[tex]\frac{80}{20-x} + \frac{120}{20+x} = 12[/tex]
80 (20+x) + 120 (20-x) = 12 (20-x) (20+x)
x=10
Sorry for asking again but I need help ASAP I will give you
100 points and a brainiest
Answer: D. 10.200
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Answers please answer it and correct correct answer will get brainlest and please answer the rate and unit rate ? :))
From $25 to $35
The percent increase is
Answer:
40 percent
Step-by-step explanation:
Start by taking the difference of the two values:
35-25 = 10.
the $10 is how much the value increased by.
To get the percent that the $25 increased by, take 10/25 to get .4
This .4 can then be turned into a percentage when you multiply it by 100. = 40 percent.
You can check your answer by finding 40 percent of 25, which is 10.
pls help ill give u brainlest
Answer:
0.8 = is the proberbilty of getting an even number and a heads when you flip a coin
0.25 = is the proberbility of getting a 2 or 4 out of the bag including 1 - 8
0.5 = the probability of drawing a yellow and green marble
1 = the probability of drawing an even number or a number greater than 4
Im not really sure about the last one tho
Step-by-step explanation:
I needd help pleaseeeee
Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim.
The owner of a football team claims that the average attendance at games is over 642, and he is therefore justified in moving the team to a city with a larger stadium. Assuming that a hypothesis test of the claim has been conducted and that the conclusion is failure to reject the null hypothesis, state the conclusion in nontechnical terms.
a) There is not sufficient evidence to support the claim that the mean attendance is greater than 642.
b) There is sufficient evidence to support the claim that the mean attendance is less than 642.
c) There is sufficient evidence to support the claim that the mean attendance is greater than 642.
d) There is not sufficient evidence to support the claim that the mean attendance is less than 642.
Answer:
a) There is not sufficient evidence to support the claim that the mean attendance is greater than 642.
Step-by-step explanation:
since in the question it is mentioned that the average attendance at games should be more 642 and according to this he moving the team with a larger stadium. Also the hypothesis conducted and the conclusion would be failure to deny the null hypothesis
So here the conclusion that should be made in non-technical term is that there should be no enough proof in order to support the claim that the mean attendence is more than $642
What is the shape of y=x3?
Answer:
cubic
Step-by-step explanation:
y = x³ is a cubic shape try graphing it
can I use Brainly on my laptop
Answer:
Yeah if you want too
Step-by-step explanation:
It depends if its school or personal
I'm using it on my own laptop
Step-by-step explanation:
Andrew picked vegetables from his garden and put them into bags.
He put 10 carrots into each of 3 bags, 8 tomatoes into each of 4 bags, and 6 turnips into each of 5 bags.
How many vegetables did he pick in all?
A. 24
B. 36
C. 92
D. 108
What is the converse of the statement below?
“If today is Friday, then tomorrow is Saturday."
Answer:
C (Sorry if its incorrect)
Step-by-step explanation:
I believe its C
Becuase a converse is switching the hypothis and conclusion around
WHAT IS THE AREA OF A RECTANGULAR GARDEN MEASURING 14 METRES BY 8.5 METRES
PLEASE HELP ASAP LOOK AT PHOTO PLEASE
Answer:
6: x = 3 and y = 5
7: x = 8 and y = 7
Step-by-step explanation:
In parallelograms opposite sides are congruent
For #6
x + 5 = 2x + 2
step 1 subtract x from each side
2x - x = x
x - x cancels out
now we have 5 = x + 2
step 2 subtract 2 from each side
5 - 2 = 3
2 - 2 cancels out
we're left with x = 3
y + 10 = 2y + 5
step 1 subtract 5 from each side
10 - 5 = 5
5 - 5 cancels out
now we have y + 5 = 2y
step 2 subtract y from each side
y - y cancels out
2y - y = y
we're left with y = 5
For #7
3x - 2 = 2x + 6
step 1 add 2 to each side
-2 + 2 cancels out
6 + 2 = 8
now we have 3x = 2x + 8
step 2 subtract 2x from each side
3x - 2x = x
2x - 2x cancels out
we're left with x = 8
6y - 8 = 4y + 6
step 1 add 8 to each side
-8 + 8 cancels out
6 + 8 = 14
now we have 6y = 4y + 14
step 2 subtract 4y from each side
6y - 4y = 2y
4y - 4y cancels out
now we have 14 = 2y
step 3 divide each side by 2
2y / 2 = y
14 / 2 = 7
we're left with y = 7
100 POINTS!!!!!
What is the strength of the association between the two variables in the scatter plot? Select from the drop-down menu to correctly complete the statement.
weak
strong
Answer:
weak cuz theres no flow its just scattered everywhere
Step-by-step explanation:
Answer:
(Sorry im late) The answer is weak
Step-by-step explanation:
I think i remember taking the test:)
The Statistical Abstract of the United States reported the percentage of people age 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of 0.12. How large a sample should be taken to estimate the actual proportion of smokers with a margin of error of 0.02
Answer:
A sample of 1015 should be taken.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
The margin of error is of:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of 0.12.
This means that [tex]\pi = 0.12[/tex]
95% confidence level
So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex]. I used 95% because the confidence level was not given.
How large a sample should be taken to estimate the actual proportion of smokers with a margin of error of 0.02?
This is n for which M = 0.02. So
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]0.02 = 1.96\sqrt{\frac{0.12*0.88}{n}}[/tex]
[tex]0.02\sqrt{n} = 1.96\sqrt{0.12*0.88}[/tex]
[tex]\sqrt{n} = \frac{1.96\sqrt{0.12*0.88}}{0.02}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.96\sqrt{0.12*0.88}}{0.02})^2[/tex]
[tex]n = 1014.2[/tex]
Rounding up:
A sample of 1015 should be taken.
Similar Triangles
A triangle has two angles measuring 90° and 50°, calculate the third angle of the triangle.
a. 50°
b. 40°
c. 45°
d. 75°
Please select the best answer from the choices provided
Answer:
B. 40°
Step-by-step explanation:
I calculated it logically
⊙O and ⊙P are given with centers (−2, 7) and (12, −1) and radii of lengths 5 and 12, respectively. Using similarity transformations on ⊙O, prove that ⊙O and ⊙P are similar.
Answer:
Whereby circle [tex]\bigodot[/tex]P can be obtained from circle [tex]\bigodot[/tex]O by applying the transformations of a translation of T₍₁₄, ₋₈₎ followed by a dilation by a scale factor of 2.4, [tex]\bigodot[/tex]O is similar to [tex]\bigodot[/tex]P
Step-by-step explanation:
The given center of the circle [tex]\bigodot[/tex]O = (-2, 7)
The radius of [tex]\bigodot[/tex]O, r₁ = 5
The given center of the circle [tex]\bigodot[/tex]P = (12, -1)
The radius of [tex]\bigodot[/tex]P, r₂ = 12
The similarity transformation to prove that [tex]\bigodot[/tex]O and [tex]\bigodot[/tex]P are similar are;
a) Move circle [tex]\bigodot[/tex]O 14 units to the right and 8 units down to the point (12, -1)
b) Apply a scale of S.F. = r₂/r₁ = 12/5 = 2.4
Therefore, the radius of circle [tex]\bigodot[/tex]O is increased by 2.4
We then obtain [tex]\bigodot[/tex]O' with center at (12, -1) and radius r₃ = 2.4×5 = 12 which has the same center and radius as circle [tex]\bigodot[/tex]P
∴ Circle [tex]\bigodot[/tex]P can be obtained from circle [tex]\bigodot[/tex]O by applying similarity transformation of translation of T₍₁₄, ₋₈₎ followed by a dilation by a scale factor of 2.4, [tex]\bigodot[/tex]O is similar to [tex]\bigodot[/tex]P.
Find any ten rational numbers between-5/6 and 5/8
Answer:
-1/12, 1/2, -1/16, 1/16, -1/20, 1/20, -1/2, 1/2, -1/10, 1/10
hope this helps
have a good day :)
Step-by-step explanation:
Answer:
10 Fractions
-5/6 = -400/480
5/8 = 300/480
201/480
202/480
203/480
204/480
205/480
206/480
207/480
208/480
209/480
210/480
10 Decimals
5/6 = -0.8333333333
5/8= 0.625
0.226
0.227
0.228
0.229
0.23
0.231
0.232
0.233
0.234
0.235
please i really need help with this
Which of the following has a slope of -2 and a y-intercept of 4?
• y= -2x + 4
• y= -2x - 4
• y= 2x + 4
• y= 2x - 4
What is the value of x in the equation −x = 3 − 4x + 6?
−9
−3
3
9
Answer:
The answer is 3
Answer:
x = 3
Step-by-step explanation:
-x = 3 - 4x +6
make the -4x positive and then add it to the -x
-x = 3 +6
+4x
3x = 3 +6
then add the 3 +6 together
3x = 3 + 6
9
3x = 9
we want to get X alone so we are going to divide 3 by both sides
3x/3 = 9/3
1x = 3
and if you did not know we usually don't show the "1" if it is in front of a exponent (you just have to remember that there is a one there)
now you have your answer
x = 3