How would i find the missing side with pythagorean theorem

To decrease an amount by 16% what single multiplier would you use

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.

Determine domain and range, largest open interval, and intervals which function is continuous.