Solve using the best method:
A football is punted into the air. Its height
h, in meters, after t seconds is given by the
equation h = -4.912 + 24.5t + 1. When
does the ball hit the ground?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

Ablue whale traveled 3112 miles in 214hours. what was the whale's rate in yards per hour? (1 mile = 1,760 yards)