If this regular decagon is rotated counterclockwise by 3 times the smallest angle of rotation, which vertex will be in the top position?   c, d, e, or f explain on how you got the answer!

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?