A firework is fired vertically into the air at a speed of 100 m/s. The expression −5t2 + 100t + 40 gives the height of the firework after t seconds. Factor this expression.

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation: