What you can do is multiply 400*20= 8,000. From here, we know that 399*20 is just one less group of 20 than 400. Therefore, we can subtract (1*20) from 8,000 to get the final answer.
8000-20=7980
Hope this helps!
If you do 24.75-12.45 you get 12.30. So there you go!
Answer:
C(n) = 12 + 1.5(n – 1)
Step-by-step explanation: