The standard deviation of a population is 2.8. what is the margin of error?

Is this a polynomial function? i need to know asap

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss