Please someone help meee

Hey am have account in but wished to create an account here you guys will me with my make new friends of uk !

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?

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)