Answer:
D. 
Step-by-step explanation:
Answer:
The dispensing unit worth today: $21,000
Step-by-step explanation:
If we assume that a year has elapsed since the dispensing unit was purchased, then we know that it has lost 25% of its initial value.
If its initial value was 28,000 then we calculate 25% of 28,000

Now we subtract 7000 from the initial amount to get the current value.
The current value is:

Answer:
3.60
Step-by-step explanation:
Kahn Academy
About 3.4% large according to the coordinates
Answer:
D
Step-by-step explanation:
We can safely assume we are dealing with an arithmetic scale because the type of scale isn't mentioned anywhere. The more right a point is on the scale, the higher its value is. We are given two points of the scale: 3 and 4. Because the scale is arithmetic, we know that 3.8 must lie on 4/5s of the length between 3 and 4 to the right of 3, which is exactly where point D is.