Is 5.421 greater or less then 5.4

For what value of (y) is 3^3/3^y =1/9

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Consider circle o, where and . m∠bpd °. °.