A class is having their picture taken. The photographer positions himself 21 feet from the center of the row of students. When the photographer looks at the last student at either end of the row, the photographer must turn 45° from center in either direction, as shown in the diagram.

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?