Answer: 10
Step-by-step explanation:
His average rate is 120 meters per minute.
Let the amount of the first brand be x, and let the amount of the second brand be y.
0.09x + 0.14y = 240 * 0.13 .................(1)
x + y = 240 ..............(2)
y = 240 - x .......................(3)
Plugging the value for y from equation (3) into equation (1), we get:

...............(4)
Equation (4) simplifies to:
-0.05x = -2.4
giving the value for the required amount of 9% vinegar as 48 ml and the required amount of 14% vinegar as 240 - 48 = 192 ml.
Answer:
1944 Inches Squared
Step-by-step explanation:
Surface area Formula for a Cube:

The "edge", which is also the side, is 18 inches.

Solve the formula.

The cube's surface area should be 1944 square inches.