Answer:
the answer is 123/7 In exact form and in mixed number form 17 4/7
1/3 of an hour is 20 minutes so 20 divided by 4 is 5 minutes per 1 mile.
1/3 of a mile is 4 hours so a full mile would be 3 times 4 which is 12 so every 12 hours is 1 mile.
1/2 a mile takes 3 hours and 2 times 3 is 6 so every 6 hours is 1 mile.
A. 5 minutes per mile
B. 12 hours per mile
C. 6 hours per mile
The correct choice is A.
I hope this helped you
The metric unit of length is the meter.
My left thumb is about 0.06 meter long.
(It's hard to tell exactly, because I'm not sure where it starts.)
Another smaller unit, called the "centimeter", is often used
for convenience. Each centimeter is 0.01 of a meter.
So 0.06 meter, mentioned above, is the same as 6 centimeters.
Isn't it already in standard form?
126 liters of pure water should be added
<em><u>Solution:</u></em>
Let "x" be the liters of pure water
Then, 18 + x is the liters of final solution
18 Liter solution of 80% acid, which means 100 - 80 = 20 % of water is used
Pure water is 100%
Then according to question, we can say,
"x" liters of pure water 100 % is mixed with a 18 liter solution of 20 % water to produce a mixture (18 + x) liter that is 90 % water
Thus we frame a equation as:
Equation:
water + water = water
Thus 126 liters of pure water should be added