Can y’all help me on question 40?! Happy Mother’s Day!

Which of the greatest common gcf of 32 and 48 a 16 b 96 c 8 d 32

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .