Question

the weight of certain microbe decrease by 25% per hour, but every three hours its weight increase by 50%. Thus the percentage weight of the microbe after 4 hours ?

A. 47,46%
B. 48,23%
C. 49,16%
D. 50,43%
E. 51,23%

Answer 1

after 1 hour the wt. will be 75,then next hour it will be 25% of 75
solve like that

Answer 2

let the weight of it be 100% or 100/100 or 1
1*(1-0.25)^3(1+0.5)= weight after4 hours

Answer 3

aw

Answer 4

:)

Answer 5

another way to think of it if that 1=0.25 = 0.75 is a bit confusing

Answer 6

When you lose 25% you are left with 75 % of your weight so

Answer 7

1*0.75*0.75*0.75*1.5<--- the last part...when you get 50% you have 1.5 times your weight so

Answer 8

@dan815 im getting 0.6328125 as my answer .. :(