A garden is in the shape of a rectangle and a semicircle as shown in the picture Which of the following is closet to the amount of fencing needed to enclose the garden?

A) 60m

B) 70m

C) 75m

D) 85m

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?