dana inserted eigth coins. consiting of dimes and nickles into a vending machine  to purchase a sinkers bars for 55. how many coins of each type did she use

Your elderly neighbor places a bag of corn kernels on your doorstep each morning. The first day, the bag contained 11 kernel of corn, the second day it contained 22 kernels of corn, 44 kernels of corn the third day, and so on. Each kernel of corn weighs 0.06 grams. How much will the contents of the bag weigh on the 29th day? Round your answer to the nearest hundredth, if necessary.

On the first day of the month, Michael places 5¢ in a jar. The next day, he places 7¢ in the jar. The third day, he places 9¢ in the jar, and so on for 24 days. What amount will be in the jar at the end of this period of time?

Harry Peters bought a new cell phone for $761.91 as the total purchase price, and can see the amount on his credit card bill. Since this sales tax can be deducted on his federal tax return, Harry needs to determine how much of the purchase was tax and cannot find his receipt. How much would the tax be, if Harry's state has a 9% sales tax rate? Select one: a. $699.00 O b. $62.91 c. O c. $693.34 O d. $68.57