a car can travel 415 kilometers on 83 liters of gasoline. How much gasoline will it need to go 245 kilometers?

What is the value of the expression below? (81^2)^1/8

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?