Jim and Carla are scuba diving. Jim started out 8 feet below the surface. He descended 19 feet, rose 3 feet, and descended 11 more feet. Then he rested. Carla started out at the surface. She descended 18 feet, rose 3 feet, and descended another 19 feet. Then she rested. Which person rested at a greater depth? Complete the explanation. Jim rested at feet below the surface while Carla rested at feet below the surface. Therefore (select) rested at a greater depth.

The anwser cause i do not understand just plez

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?