True or false the lower the frequency is the longer the wavelength becomes

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations

Which of the following is a testable hypotheses?