Whats the question ? if its who wins the dog wins.
A) A = 20,000 [Principle] * (0.05 [Interest] * 4 [Number of years]) = $4,000 interest
b) A = 20,000 [Principle] * (0.05 [Interest] * 2 [Number of years]) = $2,000 interest
23, because it is a prime number and therefore cannot be simplified enough to take outside of the square root.
Answer: 
Step-by-step explanation:
Given: The total time taken by Evan to mow the 3 lawns = 
Time taken by Evan to mow the first lawn =
Time taken by Evan to mow the second lawn =
Now,Time taken by Evan to mow the third lawn =
⇒Time taken by Evan to mow the third lawn =
⇒Time taken by Evan to mow the third lawn =
Hence, the time taken by Evan to mow the third lawn = 