HeLp. "How many times does a person's heart beat in their life? How many gallons of blood does it pump? (Estimate that the heart pumps 50 3 of blood in each beat, you should take as a reference its beats per minute and an average life of 70 years)"

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?