7/8*8/9 = (7*8)/(8*9)
Since we have an 8 both above and below, we can erase it, and so the answer is 7/9
Answer:

Step-by-step explanation:
We have been given that a series of 3 separate, adjacent tunnels is constructed through a mountain. Its length is approximately 25 kilometers.
Each of the three tunnels is shaped like a half-cylinder with a radius of 5 meters.
Since we know that volume of a semicircular or a half cylinder is half the volume of a circular cylinder.
, where,
r = Radius of cylinder,
h = height of the cylinder.
Upon substituting our given values in volume formula we will get,






Therefore, the volume of earth removed to build the three tunnels is
.
Answer:
132
Step-by-step explanation:
TPR = 180
UPT = 48
180-48=132
Answer:
The answer is 
Step-by-step explanation:
Answer:
Step-by-step explanation:
1 pie calls for 1 1/4 cups of sugar....so 4 pies calls for :
4 * 1 1/4 = 4 * 5/4 = 20/4 = 5 cups of sugar
she has 1/2 a cup....so she still needs 5 - 1/2 = 4 1/2 cups <==