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

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?