Answer:
35 days
Step-by-step explanation:
Weight gain per day = 200 pounds
Weight gained by a whale since birth = [tex] 7*10^3 [/tex] pounds
Number of days of the whale = [tex] \frac{7*10^3}{200} = \frac{7*10*10*10}{200} [/tex]
[tex] = \frac{7*1000}{200} = \frac{7000}{200} = \frac{70}{2} = 35 [/tex]
In standard notation form, the whale is 35 days old.
