You are expecting a tax refund of $5,000 in 5 weeks. A tax preparer offers you an "interest-free" loan of $5,000 for a fee of $50 to be repaid by your refund check when it arrives in 5 weeks. Thinking of the fee as interest, what weekly simple interest rate would you be paying on this loan? What is the corresponding annual rate?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?