If f(x)= -9x+12, then f(20)=__

What is the answer?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

What is the true solution to the logarithmic equation below?

Abungee jumper falls from a bridge 400 feet above ground. her height above ground after t seconds is given by the equation where h is the height of the jumper in feet and t is the time in seconds since her jump. approximately how long will it take for the bungee jumper to reach 100 feet above the ground on her initial jump?