13- =10. Answer is 3 13-6= Answer is 7

How did you use your first answer to find your send answer?

Aladder that is 30 ft long needs to reach 27 ft up a building. what should the angle of the vertical be?

Abouncy ball is dropped such that the height of its first bounce is 5.5 feet and each successive bounce is 64% of the previous bounce's height. what would be the height of the 7th bounce of the ball? round to the nearest tenth (if necessary).

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?