The total revenue r earned (in dollars) from producing a gift box of candles is given by r(p)=-10p^2+800p, where p is the price per unit.
a. find the revenues when the prices per box are $20, $25, and $30
b. find the unit price that will yield a maximum revenue. what is the maximum revenue? explain your results.

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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 marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11