# Find the speed v, in miles per hour, that will minimize costs on a 115-mile delivery trip. The cost per hour for fuel is C dollars, and the driver is paid W dollars per hour. (Assume there are no costs other than wages and fuel. Round your answer to one decimal place.)Fuel cost: C = (v^2/240)Driver: W = \$18.90I am a bit confused about this question and I ve done all the steps right but cant get the right answer

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
Question

Find the speed v, in miles per hour, that will minimize costs on a 115-mile delivery trip. The cost per hour for fuel is C dollars, and the driver is paid W dollars per hour. (Assume there are no costs other than wages and fuel. Round your answer to one decimal place.)
Fuel cost: C = (v^2/240)

Driver: W = \$18.90

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