Which of the following triangles is not possible?

A = 75 degrees, 15 degrees, 90 degrees

B = 90 degrees, 30 degrees, 100 degrees

C = 60 degrees, 60 degrees, 60 degrees

D = 90 degrees, 45 degrees, 45 degrees

Group of answer choices

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?