80% of what number is 15? Round the answer to the nearest tenth

x = 18.75 Round to nearest tenth is 18.8

Step-by-step explanation:

We have, 80% × x = 15

or,    × x = 15

Multiplying both sides by 100 and dividing both sides by 80,

we have x = 15 ×

x = 18.75

If you are using a calculator, simply enter 15×100÷80, which will give you the answer.

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation: