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Dennis_Churaev [7]
3 years ago
9

The radius of a circle is 4 centimeters. What is the circle's area?

Mathematics
1 answer:
erma4kov [3.2K]3 years ago
6 0

Answer:

50.24

Step-by-step explanation:

The area formula for a circle is pi times radius squared so 4 squared is 16 and then you multiply it by 3.14 and you get the answer 50.24

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Given f(x)= 2x^3+kx-1, and x+1 is a factor of f(x), then what is the value of k?
VMariaS [17]

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2 years ago
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Simplify the expression by combining like terms. -8y + 2 + 10y - 7<br> Please help
Alecsey [184]

Answer:

<u>2y - 5 (read below)</u>

Step-by-step explanation:

-8y + 10y = 2y

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Your expression could/would be:

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The function h (d) = 2d + 4.3 relates the height (h) of the water in a fountain in feet to the diameter (d) of the pipe carrying
mezya [45]

Answer:

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Step-by-step explanation:

Given the function h(d) = 2d + 4.3,

where:

h = height of the water in a fountain (in feet)

d = diameter of the pipe carrying the water (in inches)

<h3>h(1.5)</h3>

Substitute the input value of d = 1.5, into the function:

h(1.5) = 2(1.5) + 4.3

h(1.5) = 3 + 4.3

h(1.5) = 7 feet

The height of the water in a fountain is 7 feet when the diameter of the pipe is 1.5 inches.

<h3>h(10.3)</h3>

Substitute the input value of d = 10.3, into the function:

h(10.3) = 2(10.3) + 4.3

h(10.3) = 20.6 + 4.3

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The height of the water in a fountain is 24.9 feet when the diameter of the pipe is 10.3 inches.

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The solutions to both functions show the relationship between the diameter of the pipe to the height of the water in a fountain.  The height of the water in fountain increases relative to the diameter of the pipe.  In other words, as the diameter or the size of the pipe increases or widens, the height of the water in a fountain also increases.  

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2 years ago
The table shows which school subjects are favored by a group of students. Predict the number of students out of 400 that would p
jonny [76]

Answer:

60

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First, 3÷20 which equals .15. after do .15×400 to get to 60 students

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