Juan borrows a total of $69,500 to pay for medical school. He borrows part of the money from the school whereby he will pay 3.7% simple interest. He borrows the rest of the money through a government grant that will charge him 6.5% interest. In both cases, he is not required to pay off the principal or interest during
his 2 years of medical school. However, at the end of 2 years, he will owe a total of $6179 for the interest from both loans. How much did he borrow from each
source?

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

Anyone know? will mark brainliest if correct!