Question

Which shows the expression below simplified?

(9 × 104) × (9 × 10-4)

8.1 × 100
8.1 × 101
8.1 × 10-1
8.1 × 102

Answer 1

The numbers after the 10s are the exponents.

Answer 2

K !
we have :
9 * 10000 =90000
9*10^-4=9*0.0001=0.0009
Then :
can say :
9*9=81 or 8.1*10
Got it ?

Answer 3

Yes, thank you! :D

Answer 4

Er, how do I find the exponent at the end of the answer? o:

Answer 5

The answer is B .!

Answer 6

Oh, okay. Thanks!

Answer 7

OH! Because the exponent is only one! I got you. Thanks! :D

Answer 8

;)