PLEASE HELP Find the upper and lower bounds of a
+
b, where a = 4 and b = 2 (both have been rounded to the nearest integer).

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?

Shannon mary and john earn a weekly allowance ahannon earns the amount that is 2/3 of what john earns mary earns an amount that is 1 2/3 of what johns earns 20 dollars a week who eaens the greatest allowance and who earns the least