Please help me with this math question!

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

Can anyone me with 32,33,36,37,and 40.

Atemperature of 1.64◦f corresponds to answer in units of ◦c.