Question

The ski club is planning a trip for winter break. They write the equation C=200+10N to estimate the cost in dollars, C of the trip for N students.
Duncan and Corey both use the equation to estimate the cost for 50 students. Duncan says the cost is $10,500 , and Corey says it's $700.
A) Whose estimate is correct?
B) How do you think Duncan and Corey found such different estimates if they used the same equation?

Answer 1

A)
C= 200+10N
10 X 50=500
C=200+500=700
Corey
B)
Duncan may have rounded up for both, giving hims higher estimate.