Uh can someone explain how they got the answer too

Plz help plz give me the answer

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles