Let’s try this question again. A hot air balloon is being filled with air. After 20 minutes, the volume of the balloon is 75 cubic feet. After 60 minutes, it’s volume is 120 cubic feet. It takes 3 hours to fill the balloon at this constant rate, and the balloon was not empty initially. How much air does the balloon hold, and how much hot air was in the balloon initially.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

The diagram shows corresponding lengths in two similar figures. find the area of the smaller figure. a. 14.4 yd2 b. 24 yd2 c. 26.4 yd2 d. 28