7th grade math standard form scientific notation

In standard form:

5. 3.2 x 10^3

7. 4.1 x 10^8

9. Write the average weight of a blue whale, 2.6 x 10^5, in standard form.

15. 2.5 x 10^-3

17. 1.05 x 10^-2

19. Write the size of a grain of very fine sand, about 9.35 x 10^-3 cm, in standard form.

Can somebody help? I have been stuck on these questions for 30 minutes....
Thanks.

asked by Delilah
  1. I don't understand what you mean by "I have been stuck on these questions for 30 minutes.... "
    Are you just staring at the questions?
    The concept of scientific notation can be learned in less than 5 minutes.

    5. 3.2 x 10^3
    = 5.3 x 1000
    = 5300

    15 . 2.5 x 10^-3
    = 2.5 x .001
    = 0.0025

    You try the others.

    posted by Reiny
  2. what operation is being performed 1.2x10^2+2.5x10^4=

    posted by misty
  3. 5.7 * 10^6

    posted by Anonymous

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