C - 30%.
We know he spends less than he has expected, so we put it as a fraction calculate the percentage of the error.
So it would be:
87.5/ 125 = 0.7
And 1-0.7 = 0.3
When we move the chemical place two places to the left to make it a percentage, it will become 30%.
Answer:
D
Step-by-step explanation:
Only D is positive.
-v -2
----- = ----- = +2
-w -1
15 devided by 2 equals 7.5
C=

d.
If 5m is the radius, then multiply it by 2, then multiply it by

.
If 5m is the diameter, then just multiply it by only

.