No he is wrong there will be 150000000 bacteria on it at 2 minutes
WORK:
2 min=120 sec
120 divided by 15=8
15 times 10 (7 times)
u get 150,000,000
3-(s+4)
less than- subtract
sum- addition
since it said 3 less than the sum of a number and 4 that means you would have to add s and 4
So, first let's change these numbers into decimal form:
3*0.1 + 4*0.01 + 8*0.001 ? 1.2
Multiply:
0.3 + 0.04 + 0.008 ? 1.2
0.348 < 1.2
One and two tenths is larger.
Hopefully this is what you're asking, as this question is unclear
500=140+40h
minus 140 both sides
360=40h
divide y 40
9=h
9 hours
