Question

Find the simplified form of the expression. Give your answer in scientific notation. (please help me out)...

9. (8 × 10^7)(7 × 10^4)

A. 1.5 × 10^12
B. 5.6 × 10^12
C. 1.5 × 10^29
D. 5.6 × 1,029

Answer 1

Multiply the 8 and 7. Then add the exponents on the 10's. Then put the number into scientific notation.

Answer 2

so before Scientific notation i'd look like this...

56 x 10^7+4 ?

Answer 3

Yes if you add the 7 and 4

Answer 4

thank you a lot! I honestly understand now.

Answer 5

Wonderful!! Did you put it into scientific notation?

Answer 6

how would i do this?

What is the simplified form of the expression? (y^–5)^–10y^10

Answer 7

wait, i'm confused now.!

Answer 8

56 x 10^11 is not scientific notation because 56 is not between 1 and 10

Answer 9

like i added the 7 and 4 together and got 11. but it doesn't match any of the answer choices ) :

Answer 10

Yeah i knew that the exponents have to be smaller than the ten...

Answer 11

No. Not the exponents...the 56 has to be between 1 and 10 so rewrite it as 5.6 x 10^12

Answer 12

Oh okay!! I totally got it.
thank you means a lot.

Answer 13

yw