Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation 2 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 140-50/12 which of the following is an equivalent form of the expression for the amount remaining in shipment 2?