A small organism with a length of 7.5x10^-5 meter tripled in size. Write the new length in standard notation

Answer 1

multiply the 7.5 times 3 to give you
22.5 times 10^-5

To get to standard notation you need to write the 22.5 as 2.25 x 10^1

combine the 1 + -5 to get -4 because we have the same base of 10. When multiplying, you keep the base and add the exponents.

2.25 x 10^-4