Question

A baby blue whale can gain up to 200 pounds a day after it is born. If a baby blue whale has gained 7 x 103 pounds since its birth, how many days old is it?Express your answer

in standard notation.

Answer 1

35 days

Explanation:

Weight gain per day = 200 pounds

Weight gained by a whale since birth =
`7*10^3` pounds

Number of days of the whale =
`(7*10^3)/(200) = (7*10*10*10)/(200)`

`= (7*1000)/(200) = (7000)/(200) = (70)/(2) = 35`

In standard notation form, the whale is 35 days old.