What is 670,200,000 in scientific notation

Solve the word problem. the table shows the low outside temperatures for monday, tuesday, and wednesday. by how many degrees did the low temperature increase from monday to tuesday? this function table shows the outside temperature for a given a. 21.1⁰ b. 8.6⁰ c. 4.9⁰ d. 3.9⁰(the picture is the graph the the question is talking about.)

Simplify the expression. -2/5(10+15m-20n)

Find the area of the regular hexagon if a side is 20 cm.