Over the weekend, brady and jack drove to key west to go scuba diving. now they're preparing to go home. brady needs gas for his jeep, which gets 25 miles per gallon for gas mileage. when he stops at the gas station, he already has 6 gallons of gas in his tank. he buys more gas for $1.25 per gallon. find the number of miles that brady can drive, d(s), as a function of the amount he spends on gas, s. d(s) =

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10