Question

A blue whale can eat 3 x 10^8 krill in a day. All of that krill weighs approximately 6.3 x 10^9 decigrams. About how much does each krill weigh? Give your answer in standard form

Answer 1

21 decigrams

Explanation:

we know that

To find out the weight of each krill, divide the total weight of the krill by the number of krill

`(6.3*10^(9))/(3*10^(8))`

Remember that

To divide two numbers in scientific notation, divide their coefficients and subtract their exponents

`(6.3*10^(9))/(3*10^(8))=((6.3)/(3))*10^((9-8))=2.1*10=21\ decigrams`