Can i get the answer to this and the full equation on paper

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?

Someone me what is the area of this figure? 18m 18m 8m 16m

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left