Susie buys a new pair of boots for $68.55. If Susie paid a 7.5% sales tax, what was the original cost of the boots?

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Which expression is rational? 6. , square root two, square root 14, square root 49