A light flashes every 3 minutes, a second light every 90 seconds, and a third light every 45
seconds. If the three lights flash together at 8:00 AM Monday morning, when is the next time
they will all flash together?

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

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.