A1, a1r 1, a1r 2, a1r 3, a1r 4, a1r n-1 is the general formula for the sum of a what?

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.

If log_3(x)=4.5 and log_3(y)=3, what is log_3(x^2/y)? a. 3b. 6.75c. 6d. 1.5

Atown has a population of 7000 and grows at 3% every year. to the nearest year, how long will it be until the population will reach 12400?