You go shopping with a friend and end up buying a shirt for $23.90, a pair of pants for $34.50 and some socks for $3.65. If sales tax is 7.5%, what is your total sales tax amount for all three items?

Could somebody me with this radical simplification?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.