Find the following for the function f(x) = 3x^2 + 4x - 4.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

A6 ounce bottle of dressing costs $1.56 a 14 ounce bottle costs $3.36 a 20 ounce bottle costs $5.60 which has the lowest cost per ounce

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )