Betty had 1 1/4 hours to finish a test. She was nervous and it took her 1/2 an hour to calm down. How much time did she have lef
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The average rate of a function f(x) over an interval x = a and x = b is given by:
Given the function
The average rate of change from x = 1 to x = 2 is given by:
Given the function
The average rate of change from x = 1 to x = 2 is given by:
Solution
f(r) = 3.14
Now we have to find the area of the circle when the radius (r) = 4.
Plug in r = 4 in f(r) to get the area of the circle.
f(4) = 3.14
f(4) = 3.14 * 4 * 4
f(4) = 3.14 *16
f(4) = 50.24
The answer is C. 50.24