In order to mow the lawn, we need to buy gasoline for our lawnmower. If we bought 3.5 gallons of gas and paid $4.55 total, how much did the gas cost per gallon? Round your answer to the nearest cent (hundredth)

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?