Will was scuba diving while his friend Sabrina was climbing a mountain. If Will was at an elevation of -75 feet, and Sabrina was at an elevation of 2,195 feet, what was the difference in elevation (in feet) between Will and Sabrina?

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

What is the measure of angle tvu shown in the diagram below

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16