A construction crew is lengthening a road that originally measured 55 miles. The crew is adding one mile to the road each day.The length, L (in miles), after d days of construction is giving by the following function.

Question

L(d)=55+d
What is the length of the road after 21 days?

Answer 1

To find the length of the road after 21 days, we substitute d = 21 into the function L(d) = 55 + d:
L(21) = 55 + 21 = 76

So, the length of the road after 21 days is 76 miles.