Identify the initial amount a and the rate of decay r (as a percent) of the exponential function y=0.5(34)t. Evaluate the function when t=3. Round your answer to the nearest tenth.

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31