A toy rocket is fired from the top of a hill. Its height above the ground can be modeled by the function y=-16x² +96x +112, where x measures time in seconds and y measures the height, in feet, above the
ground.
a.
Find the greatest height the rocket reaches before it lands on the ground.
b. Find the time at which the rocket lands on the ground.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Which of the following are accepted without proof in a logical system? check all that apply.

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?