$35 at a simple interest rate of 2.5% for 2 year. Find the balance

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

The graph represents f(x)=[x]+3. what is f(-2.2)?

The volume of a spherical hot air balloon v(r) = 4 3 ? r3 changes as its radius changes. the radius is a function of time given by r(t) = 3t. find the instantaneous rate of change of the volume with respect to t at t = 2.