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3 years ago

HELP HELP HELP WHAT IS THE ANSWER TO THIS PLEASE HELP ME YOU'LL GET 50+ BRAINLIEST POINTS AND BRAINLEIST HELP PLEASE

Mathematics

1 answer:

krek1111 [17]3 years ago

6 0

Answer:

1055.58 cube inches

Step-by-step explanation:

radius time height

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In the United States the ages 13 to 55+ of smartphone users approximately follow a normal distribution with approximate mean and

andrezito [222]

Answer:

P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 ) = 0.8186

Step-by-step explanation:

Solution:

- Let X be a random variable that denotes the age of people who use smartphones.

- The random variable X follows a normal distribution with parameters mean (u) and standard deviation (s).

-The normal distribution can be expressed as:

X~ N ( u , s^2 )

X~ N ( 36.9 , 13.9^2 )

- The probability that a random smartphone user in the age range 13 to 55+ is between 23 and 64.7 years old can be expressed as:

P ( 23 < X < 64.7 )

- We will compute the Z-score values for the interval:

P ( 23 < X < 64.7 ) = P ( (x1 - u) / s < Z < (x2 - u) / s )

P ( 23 < X < 64.7 ) = P ( (23 - 36.9) / 13.9 < Z < (64.7 - 36.9) / 13.9 )

P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 )

- We will use Z-table to evaluate:

P ( 23 < X < 64.7 ) = P ( -1 < Z < 2 ) = 0.8186

5 0

4 years ago

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Grazer sells cool Minecraft t-shirts through his

notsponge [240]

Answer:

125 T-shirts

Step-by-step explanation:

Divide $875 by $7. There is your answer.

3 0

3 years ago

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What is the 10th term in -9,-6,-1,6,15

levacccp [35]

Answer:

Step-by-step explanation:

This is an increasing sequence, with -9 as its first term. The first increase is +3, then +5, +7, and +9. The differences increase by 2 each time. The sixth term will be 15 + 11, and the seventh would be 15 + 11 + 13. We can follow this pattern to get to the tenth term. 15 + 11 + 13 + 15 + 17 + 19 = 90

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3 years ago

National Textile installed a new textile machine in one of its factories at a cost of $250,000. The machine is depreciated linea

kirill115 [55]

Answer:

The required expression is $y=250,000-24,000 t$

Step-by-step explanation:

Consider the provided information.

National Textile installed a new textile machine in one of its factories at a cost of $250,000.

That means for 0 year the cost of the machine is $250,000.

This can be written as: (0, 250,000)

Over 10 years with a scrap value of $10,000

That means for 10 year the cost of the machine is $10,000.

This can be written as: (10, 10,000)

Now first find the rate of change:

Rate of change=m= $\frac{Rise}{Run}=\frac{10,000-250,000}{10-0}$

Rate of change=m= $\frac{Rise}{Run}=\frac{-240,000}{10}$

Rate of change=m= $\frac{Rise}{Run}=-24,000$

Now use the point-slope form of an equation of a line with the point (0, 250,000), we can find the required expression.

$(y-250,000)=-24,000(t-0)$

$y-250,000=-24,000 t$

$y=250,000-24,000 t$

Hence, the required expression is $y=250,000-24,000 t$

6 0

3 years ago

laura bought a square canvas to paint a picture of her cat. one side measures 22 centimeters. what is the area of canvas.

Nikitich [7]

If we know that Laura's canvas is square, and one side is 22cm,

area of a square is l*w, with a special case of l=w

the area will be
A= l*w=22*22=484cm^2

also, Asquare is=l^2

4 0

3 years ago

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