Identify the initial amount a and the rate of decay r (as a percent) of the exponential function y = 0.5 Evaluate the function when t= 3
Round your answer to the nearest tenth.

Draw a tape diagram to represent each situation. for some of the situations, you need to decide what to represent with a variable andre bakes 9 pans of brownies. he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students