Some fireworks are fired vertically into the air from the ground at an initial speed of 80 feet for second. The equation for this object’s height h at time t seconds after launch is h = -16t^2 + 80t. How long will it take the fireworks to reach the ground ?

x + 4/7

step-by-step explanation:

use cymath

1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;