Answer:
6/25
Step-by-step explanation:
P(have belief) =76/100 = 19/25
P (does not have belief) = 1-19/25 = 6/25
To do this you equate the two and use x for hours.
So your equation looks like this: 100+15x=75+17x. Now move like terms to get 25=2x. The job will be 12.5 hours long to cost the same.
Let 
be the number of liters of the 10% solution she needs to use. She'd end up with a 6% solution with a volume of 
liters. The starting solution contains 0.04*9 = 0.36 liter of salt. Each liter of the 10% solution contributes 0.1 liter of salt, so that
Solve for :
so Mayra needs to add 4.5 liters of the 10% solution.
Answer:
yes
Step-by-step explanation:
every input has exactly one output.
To compare the speed for the both of them, it would be helpful to convert the units to the same units in this case to units of yards per minute. We calculate as follows:
12 / 60 minutes = 0.2 miles/minute
0.2 × 5280 ft = 1056 ft/minute
1056 / 3 ft = 352 yds/minute
4.4 x 60 = 264 ft/minute
264 / 3 = 88 yds/minute
352 - 88 = 264 yds/minute faster than the boy
