I need help with math please

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

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

Which of the following is closest to 32.9 x 7.5? a: 232 b: 259 c: 220 d: 265