Just 7% of the atmosphere is made up of oxygen at the top of Mount Everest. If sea level atmosphere has three times as much, what percentage oxygen does the atmosphere have? (GIVING BRAINLIEST)​

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.

When you find the area of a triangle do you use in. or in2