Answer:

Step-by-step explanation:
You plug in the points in this equation 
So
= 
Answer:
3/4
Step-by-step explanation:
2/5+1/4+1/10=8/20+5/20+2/20=(8+5+2)/20=15/20=3/4
Interest equals principle (the amount that you had to begin with) times the rate (the rate if interest) times the time (usually in years)
25.35 seconds. Add all 4 numbers and divide by 4