What is 1×1? I need help with this please.

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.

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

See attachment below and find the equivalent of tan(∠qsr)