Find x, if it is a decimal round to the nearest tenth. PLEASE ANSWER BOTH QUESTIONS AND HELP ASAP

Naomi’s parents want to have 50,000, saved for her college education, if they invest 20000 today and earn 7% interest compound annually, about how long will it take them to save 50 thousand

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.