Express the number in scientific notation. 780,000,000

A).78 * 109 B).78 * 10-9 C) 7.8 * 108 D) 7.8 * 10-8

If tan x = 1.98 and sin x =.89, what is cos x

The area of a circle is approximately 379.94 square inches. What is the diameter of the circle? [Use 3.14 as an approximation for pi.]

What is three over two multiplied by - 2

What's the answer to f (x) x=1

What is 35 divide by 573

Evaluate e^-3. round your answer to three decimal places

What is the total cost or sale price to the nearest cent? $10 lamp; 5% tax

Which of the following tables represents a function? A. x) 6 6 7 7 y) 2 - 2 3 - 3 B. x) 2 - 2 3 - 3 y) 5 5 7 7 C. x) 3 - 3 3 - 3 y) 6 7 8 9 D. x) 4 4 5 5 y) 1 2 3 4

Kayla is 2 times as old as gabriella. 12 years ago, kayla was 6 times as old as gabriella how old is gabriella now i need step by step so i know how and get full credit

Dan must do homework for 1/2 of an hour and clean his room for 1/3 of an hour before he can play. What faction of an hour must Dan do homework and clean before he can play