State whether the following are true or false:
If A = {5, 6, 7} and B = {6, 8, 10, 12}; then A
U B = {5, 6, 7, 8, 10, 12).

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?