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Ally
Ally asked in Science & MathematicsChemistry · 9 years ago

Scientific notation..need to show work please!!!?

A music download web site announced that over 4x10(to the ninth power) songs were downloaded by 5x10(to the seventh power) registered users. What is the average number of downloads per user.....

SHOW ALL WORK!! Please

A) 8x10(to the negative first power)

B) 8x10( to the first power)

There are approx.45 hundred species of mammals on earth and 2.8x10(to the fourth power) species of fish. What is the difference in the number of species?

A) 6.2x10( to the zero power)

B) 2.35x10(to the fourth power)

C) 1.6x10(to the negative first power)

D) 3.25x10(to the fourth power)

1 Answer

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  • Brown Eyes
    Lv 6
    9 years ago
    Favorite Answer

    It's not possible to have a negative exponent for the first one, so the answer is 8x10^1 or an average of 80 downloads per user.

    28000-4500=23500

    2.35X10^4

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