The function below can be used to calculate the cost of surfing the internet, f(m), which is based on a $10 initial charge and a fee of $.15 per minute, m, till you sign off. f(m)=10+0.15m if jon paid $40, how many minutes did he use the internet?

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.