What’s the answer ? Help ?

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

Which expression is equal to (f+g)(x)?

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase