Amodel rocket was launched from the top of a building. the rocket's approximate height can be modeled by the quadratic equation h = -4.9t2 + 53.9t + 127.4, where h is the rocket's height, in meters, after t seconds. when factored, this equation is h = -4.9(t - 13)(t + 2). what is a reasonable time for it to take the rocket to land on the ground?

You are looking for the x-intercepts. Only one intercept will be valid because time must be positive!

0 = -4.9(t - 13)(t + 2)

0 = -4.9 , 0 = t - 13 , 0 = t + 2

False, t = 13 t = -2 (not valid)

13 seconds

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

step-by-step explanation: