20. Reduction of one's ability to exercise or perform work begins at the high altitude of a. 3, 0 feet above sea level.
b. 3,500 feet above sea level.
C. 4,000 feet above sea level.
d. 5,000 feet above sea level.

Aball is thrown upward in the air, and its height above the ground after t seconds is h ( t ) = 57 t − 16 t 2 feet. find the time t when the ball will be traveling upward at 14.25 feet per second.

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer