What is 1,650,000,000 in scientific notation?

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15