Compute the simple interest if $12,600 is invested for 9 months at 7% per year.

Can any one me with the answers to these questions asap?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .