Please help!! Asap! (Photo) (one question)

Abcd is a square. what is the measure of angle bac

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?

The trapezoid below has been enlarged by a scale of 1.5. what is the area of the enlarged trapezoid?