What is the product of 2.5 × 10−15 and 3.9 × 1026?

Which statement most accurately describe why the division property of exponents does not apply to the expression (-8)^2/(-3)^4

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

Asap! i'm not good math and i'm lost.