Identify the initial amount a and the rate of decay r (as a percent) of the exponential function y = 8(1 -0.15)'. Evaluate the function when t=3. Round your answer to the nearest tenth.

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?