Help with physics problem?

Question

The mass of a newborn baby's brain has been found to increase by about 1.6 mg per minute.

A) How much does the brain's mass increase in one day?

B) How long does it take for the brain's mass to increase by 8.0×10^−3 kg?

Answer 1

in a day (24hr) it would increase 1.6x (24x60)

                                                           1.6x1440

                                                             =2304mg or 2.304g

B) it would take 3.47222222222222222 days

(8.0x10^-3kg) means 8 times 0.001 kg which equals 0.008 kilograms or 8gram

Answer 2

(A) A day = 24 hrs x 60min = 1440 minutes

     So brain mass increases 1.6 x 1440 = 2,304 mg = 2.304 g in 1 day

(B) 8x10^-3 Kg = 8 g

     To increase 8 g, it takes 8/2.304 = 3.47 days

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