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MAXImum [283]
2 years ago
5

On a standardized exam, the scores are normally distributed with a mean of 135 and a

Mathematics
1 answer:
labwork [276]2 years ago
3 0

Answer:

-1

Step-by-step explanation:

mean, mu = 135.

Standard deviation = 20

X = 115

use the z score formula : z = \frac{x-mu}{standard deviation}

to get (115-135)/20 = -1

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3.A prop for the theater club’s play is constructed as a cone topped with a half-sphere. What is the volume of the prop? Round y
Marizza181 [45]
The answer is 2,713 in³

The volume (V) of the prop is the sum of the volume of cone (V1) and half of the volume of the sphere (V2): V = V1 + 1/2 * V2

Volume of the cone is:
V1 = π r² h / 3
According to the image,
h = 14 in
r = 9 in
and
π = 3.14
V1 = 3.14 * 9² * 14 / 3 =  1,186.92 in³

The volume of the sphere is:
V2 = π r³ * 4/3
According to the image,
r = 9 in
and
π = 3.14
V2 = 3.14 * 9³ * 4/3 = 3,052.08 in³

The volume of the prop is:
V = V1 + 1/2 * V2
V = 1,186.92 in³ + 1/2 * 3,052.08 in³
V = 1,186.92 in³  + 1,526.04 in³ 
V = 2,712.96 in³ ≈ 2,713 in³
5 0
3 years ago
Plz help fast.Aka please don't waste my points.Show your Work
Andrej [43]
She ate 3 cookies, then gave away half. Because parentheses means that process happens first, and c represents the number of cookies, the equation would be as follows:

(c-3)÷2, or A
6 0
3 years ago
Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown
Lerok [7]

Answer:

Fiona is not correct because a larger part of the square is white.

Step-by-step explanation:

the blue area only makes up 1/3 of the square

6 0
3 years ago
Read 2 more answers
The 1-mile race is equal to how many feet?
lord [1]
5280 feet
1 mile is equal to 5280 feet
i think that’s what you’re asking
5 0
3 years ago
What is 8.25 rounded off to the nearest whole number
Ugo [173]

Answer:

8

Step-by-step explanation:.25 is lower than .5

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3 years ago
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