2 years ago

Jordan buys a big drum. The diameter of a drum circle is 12 feet. What is the area of the drum?

1 answer:

5 0

In order to complete this question we would need to know the height of the drum and the diameter. then plug the information into this formula. A=2πrh+2πr2 (r= 1/2 diameter)

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10. The sum of two numbers is 13 more than twice the first number. Their difference is 14 less than the second number. Find each

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The sum of two numbers is 13 more than twice the first number:

x + y = 2x +13

x - y = y - 14

solve the system of equations:

x - (x + 13) = (x +13) - 14

x = -12

y = 1

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2 years ago

Natalie's aunt gave her $47 to spend on clothes at the mall. She bought 4 shirts that cost $4 each and a pair of pants that cost

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Answer:$18

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2 years ago

The mean number of words per minute (WPM) typed by a speed typist is 149 with a standard deviation of 14 WPM. What is the probab

Troyanec [42]

Answer:

78.81%

Step-by-step explanation:

We are given;

Population mean; μ = 149

Sample mean; x¯ = 147.8

Sample size; n = 88

standard deviation; σ = 14

Z-score is;

z = (x¯ - μ)/(σ/√n)

Plugging in the relevant values;

z = (147.8 - 149)/(14/√88)

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