Maria drops a hammer from an apartment that is 30 meters above the ground. The

height of the hammer in meters, h, after t seconds is modeled by the function

h (t) = - t - 2t + 30. Find the approximate number of seconds it will take for the

hammer to hit the ground. Round your answer to the nearest whole number.

A. 0

B. 5

C. 10

D. 30

Question

Mathematics

Oliver Barker

20 August, 13:26

Maria drops a hammer from an apartment that is 30 meters above the ground. The

height of the hammer in meters, h, after t seconds is modeled by the function

h (t) = - t - 2t + 30. Find the approximate number of seconds it will take for the

hammer to hit the ground. Round your answer to the nearest whole number.

A. 0

B. 5

C. 10

D. 30

+1

Answers (1)

Know the Answer?

Elise Turner · Answer 1

C. 10 s.

Step-by-step explanation:

When the hammer reaches the ground the height is 0 m, so:

-t - 2t + 30 = 0

-3t = - 30

t = - 30/-3

= 10 seconds.