The weight of an African elephant is 6 × 10^6 grams; the weight of a tiger is 3 × 10^5 grams. How many times heavier is the elephant than the tiger? A) 2 gramsB) 20 gramsC) 200 gramsD) 2,000 grams

Hey there,

Your question states: The weight of an African elephant is 6 × 10^6 grams; the weight of a tiger is 3 × 10^5 grams. How many times heavier is the elephant than the tiger? 

(Tiger)

So we do 3 × 10^5.

10^5 = 100,000

3 × 100,000 = 300,000

(Elephant)

 6 × 10^6

10^6 = 1,000,000

6 × 1,000,000 = 6,000,000
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What is greater?

300,000 (or) 1,000,000

1,000,000 is the greatest number.

( it has 7 digits, as for the tiger, weigh's only 6 digit's.

Your correct answer would be D.) 20 grams apart.

Gram's are measured differently, remember!

Hope this helps.
~Jurgen