A scientist dropped an object from height of 320 feet. The height of the object is modeled by the equation h=320 - 16t^2 . After how much time will the object hit the ground? v/20 seconds

10 seconds

40 seconds

20 seconds

√20

Step-by-step explanation:

hit the ground means h = 0

0 = 320 - 16t²

16t² = 320

t² = 320/16 = 20

t = √20

b 1: 45 am

step-by-step explanation:

its that because if it was in the pm it would be 1345

7

step-by-step explanation:

yuo ned the activity or vertical angle of the form of 1,7 but 2,2 has a c4,2 as it verticie so i not have a car