PLEASE HELP!!*URGENT** If I=Prt, Solve for the Principle,
I = $640, P =, r = 4%, t = 8 years

A) 2,000

B)20

C)20,000

D)200

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?