Scores on a national math test are Normally distributed, with a mean score of 490 and a standard deviation of 50. Which test score represents the top 20%, rounded to the nearest whole number?
Find the z-table here.
426
448
532
554
Answer:
532
Step-by-step explanation:
The score that represents the top 20% = A score = 80%
Z score for 80% percentile = 0.842
We solve using the z score formula
z = (x-μ)/σ, where
x is the raw score = ??
μ is the population mean = 490
and σ is the population standard deviation = 50
Hence:
0.842 = x - 490/50
Cross Multiply
0.842 × 50 = x - 490
x = 0.842 × 50 + 490
x = 42.1 + 490
x = 532.1
Approximately = 532
Therefore, the test score = 532
Answer:
532
Step-by-step explanation:
edg 2020-2021
Please help!!!! Will Brainlist 30 points!!!
Answer:
135 degrees
Step-by-step explanation:
Answer:
It's C) 135
Step-by-step explanation:
You do 180-45 to get your answer. With questions like these or ones ab triangles the whole would be 180 and you add or subtract to get your answers
Translate to word form:
x + 29
1. the total of x and 29
2. x times 29
3. 29 less than x
What’s the missing term ?
HELP PLZ!!!
A chord is a diameter.
-always
-sometimes
-never
Answer:
always hope this helps :)
Step-by-step explanation:
Step-by-step explanation:
sometimes would be your answer<3
The answer is sometimes, but this is only when the chord passes through the centermost point on the circle.
Find the perimeter of a triangle with sides that measure 2.7km,3.3km,4.3km
Answer:
10.3 km
Step-by-step explanation:
Perimeter = side1 + side2 + side3
side1 = 2.7 km
side2 = 3.3 km
side3 = 4.3 km
Perimeter = 2.7 + 3.3 + 4.3
Perimeter = 10.3 km
which is a multiple of 3
Answer: you forgot a picture but here are some
Step-by-step explanation:
6, 9, 12, 15 ect
can some one help me with this
Answer:
Actually i don't know what is the wanted but now
i will find the total of the teenagers.
Step-by-step explanation:
[tex] \frac{4000}{45\%} = \frac{x}{100\%} \\ x = \frac{4000 \times 100}{45} \\ x = 8889 \: \: teenagers[/tex]
I hope that is useful for you :)
Answer:
this is tating the plant
Write 3-5 sentences about the process of GCF Factoring Method
Answer:
Factoring out the GCF is the first step in many factoring problems. Step 1: Determine the greatest common factor of the given terms. The greatest common factor or GCF is the largest factor that all terms have in common. Step 2: Factor out (or divide out) the greatest common factor from each term.
Step-by-step explanation:
I WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
IF YOU SEND ONE MORE LINK AGAIN I WILL REPORT YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
h(x) =-(x+5)^3
Step-by-step explanation:
ASAP NEED HELP DUE TMR
Patti starts out on day 1 with $0.01 and doubles her money each day to create a sequence of $0.01, $0.02, $0.04, $0.08 and so on. How much money should she have on day 12 ?
A. $9.60
B. $10.24
C. $20.48
D. $40.96
Answer:
D.40.96
Step-by-step explanation:
1-.01×2=.02
2-.02×2=.04
3-.04×2=.08
4-.08×2=.16
5-.16×2=.32
6-.32×2=.64
7-.64×2=1.28
8-1.28×2=2.56
9-2.56×2=5.12
10-5.12×2=10.24
11-10.24×2=20.48
12-20.48×2=40.96
(-2) elevado a -4 respuesta porfavor
Answer:
16
Step-by-step explanation:
-2 to the 4th power is expressed as;
= (-2)^-4
= -2 × -2 × -2 × -2
= (-2×-2)×(-2×-2)
= 4×4
= 16
Hence -2 to the 4th power is equal to 16
11. The population of 1,000 unicorns is decreasing by 8% every year.
What is the independent and dependent variables of this situation?
A. Independent - Population; Dependent - years
B. Independent - Years; Dependent - population
What is the value of x?
x = 25
x = 180
x = 135
x = 20
Answer:
x=20
Step-by-step explanation:
Since all the angles in any give triangle adds up to 180, we can make an equation from this geometry question. x+5+7x-5+x=180 (Adding all the angles). If you simplify this, it becomes 9x=180, or x=20.
Please, please, please help?
Simplify: 12(x^-4)^2 / 4(x^-2)^-3
Answer:
3/x^14
Step-by-step explanation:
Answer:
3x⁻¹⁴ or 3/x¹⁴Step-by-step explanation:
12(x⁻⁴)² / 4(x⁻²)⁻³ =12/4 × x⁻⁸/x⁶ =3x⁻⁸⁻⁶ =3x⁻¹⁴ or 3/x¹⁴Bonnie's doctor recommended that she drink 2cups of milk per day. If she buys 3 quarts of milk,will it be enough milk to last 1 week?
Answer:
She does not have enough milk to last for 1 week
Step-by-step explanation:
From the question, we are told that:
Bonnie's doctor recommended that she drink 2cups of milk per day.
Step 1
The number of days in a week is 7 days
Hence
1 day = 2 cups of milk
7 days = x
Cross Multiply
x = 7 × 2 cups of milk
= 14 cups of milk.
Step 2
If she buys 3 quarts of milk,will it be enough milk to last 1 week?
We have the conversion rate as:
1 quart = 4 cups
Therefore,
1 quart = 4 cups
3 quarts = x cups
Cross Multiply
x cups = 3 quarts × 4 cups/1 quart
x cups = 12 cups of milk
This means she bought 12 cups of milk.
Therefore, from the above calculation, she does not have enough milk to last for 1 week because due to her doctor's recommendation, she need 14 cups of milk for the week but she only bought 12 cups of milk
Answer:
70
Step-by-step explanation:
68+2
the length of a rectangle is 2 inches less than 3 times it width . The perimeter of the rectangle is 124 inch. WHat is the length of the rectangle
Step-by-step explanation:
let w = width
length = 3w-2
perimeter = 2*length + 2*width
perimeter = 2(3w-2) + 2w
perimeter = 6w - 4 + 2w
perimeter = 8w - 4
perimeter = 124 inch
8w - 4 = 124inch
+4 to each side
8w = 128inch
divide each side by 8
w = 16
length = 3w-2
= 3(16) - 2
length = 46 inch
how do you write 7 a mixed number in the simplest form
What does this even mean?
5k + 30 = -20 - 5k
Solve for K.
5k + 30 = -20 - 5k
5k + 5k = -20 - 30
10k = -50 / : 10
k = -5
Answer:
-5 = k
Step-by-step explanation:
5k + 30 = -20 - 5k
5k + 30 + 20 = 5k + 50
-20 - 5k + 20 = -5k
5k + 50 = -5k
5k + 50 - 5k = 50
-5k - 5k = -10k
50 = -10k
50 / -10 = -5
-10k / -10 = k
-5 = k
Help with graph pleaseeee
A package of twelve cans of black beans cost $6.84. What is the cost of 5 can of black
beans?
$8.77
$0.57
$2.85
$16.42
Answer:
$2.85
Step-by-step explanation:
Answer:
0.57
Step-by-step explanation:
no prob
The shape of a patio is triangle without hight of 8 ft and base of 17 ft what is the cost of out door carpeting to cover the patio of the carpeting costs 6.50 per ft
Answer:
$442
Step-by-step explanation:
Given :
Height of patio, h = 8ft
Base of patio = 17 ft
Cost of carpeting = $6.50 per ft²
Area of triangular patio :
Area = 1/2 * base * height
Area = 0.5 * 17 * 8
Area of patio = 4 * 17
Area of patio = 68 ft²
Cost of carpeting :
Area of patio * contains st per ft²
68 * 6.50
= $442
HELP I NEED IT NOW THANKS
A Camera has a list price $560.99 before tax if the sales tax rate is 7.75% find the total cost of the camera wit sale tax included round your answer to the cent
Answer:
$604.47
Step-by-step explanation:
Given data
Cost of camera= $560.99
Tax= 7.75%
Let us find the amount of the tax
=7.75/100* 560.99
=0.0775*560.99
=$43.48
Hence the amount of the tax is $43.48
Therefore the total cost is
=43.48+560.99
=$604.47
Find x. Round your answer to the nearest tenth of a degree
Answer:
tan^-1(36/24)= 56.3° the answer to the question
Solve for each question.
Answer:
PN = 30
PNM = 90 degrees
PNL = 90 degrees
hope i helped you
Step-by-step explanation:
What is the surface area of the shape in the diagram?
7 cm
6 cm
12 cm
4 cm
Simplify.
(3-2i)(-5)
Answer:
2i-15
......................
The regular price of a brand new pair of shoes is $72. When using a coupon the price went down to $54. What was the percent off on the coupon used?