Question

If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y=x+2
B. y=x+3
C. x=y+3
D. y=1,000x
E. x=1,000y

Answer 1

The given relationship between x and y can be expressed as
\[\large 10^{x}=\frac{10^{y}}{1000}\ .........(1)\]
Does that make sense as a first step towards a solution?

Answer 2

hmmmm.... why?

Answer 3

wait nvm i get it

Answer 4

please go on

Answer 5

wait why is the 1 at the end? what is that?

Answer 6

To find 0.1% of a quantity, we divide the quantity by 1000.
The (1) at the end is simply a reference number for this equation. We need to use equation (1) to form another equation.

Answer 7

okay

Answer 8

Next step is to take logs of both sides of equation (1). Please do that and post your result.

Answer 9

Hey we don't use logs for this question

Answer 10

Who says we don't use logs?

Answer 11

The GRE book I'm using ... There isn't any logs at all

Answer 12

Does the book suggest a method of solving that doesn't use logs?

Answer 13

well the solution is this but i don't understand it....

Answer 14

covalent compound CCl4?

Answer 15

tetraphosphorus decoxide?
Express your answer as a chemical formula.

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Answer 17

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Answer 18

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Answer 19

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Answer 20

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What is the approximate area of the top of each piece of pie?

3.

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Answer 26

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25x^2 u2212 110x + 121
25x^2 u22

Answer 27

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Answer 28

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Answer 29

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Answer 31

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Answer 32

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Answer 33

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2x2y2 + 3x4y + 10x6
4x4