The radius of earth' s moon is about 173,700,000 cm. write this number in scientific notation.

1.73*10^8

A number scientific notation has to be between 1-10 and 1.73 is. Start at the end of the number and move back until you get to 1.73. Moving left/backwards gives you an positive exponent and moving right/frontwards gives you an negative exponent. Since you moved back 8 spaces you have 1.73 * 10^8

im not sure

step-by-step explanation:

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: