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went 5 miles uphill at 40 mph, it took 5 miles/40 mph = 1/8 hour to travel uphill. went 5 miles downhill at 60 mph, it took 5 miles/60 mph = 1/12 hour to travel downhill. e car traveled a total of 5 + 5 = 10 miles over 1/8 + 1/12 = 3/24 + 2/24 = 5/24 hour. This gives us an average speed of 10mi /.(5/24 hour) = ph = 48 mph. at the most common mistake is simply averaging 40 mph and 60 mph for an average speed of 50 mph.

went 5 miles uphill at 40 mph, it took 5 miles/40 mph = 1/8 hour to travel uphill. went 5 miles downhill at 60 mph, it took 5 miles/60 mph = 1/12 hour to travel downhill. e car traveled a total of 5 + 5 = 10 miles over 1/8 + 1/12 = 3/24 + 2/24 = 5/24 hour. This gives us an average speed of 10mi /.(5/24 hour) = ph = 48 mph. at the most common mistake is simply averaging 40 mph and 60 mph for an average speed of 50 mph.

Calculus: Early Transcendentals
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...
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What is My Slope? Recall that average speed is distance traveled divided by corresponding time elapsed. If the car went 5 miles uphill at 40 mph, it took 5 miles/40 mph = 1/8 hour to travel uphill. %3D If the car went 5 miles downhill at 60 mph, it took 5 miles/60 mph = 1/12 hour to travel downhill. = 10 mi x 24/5 mph = Thus, the car traveled a total of 5 + 5 = 10 miles over 1/8 + 1/12 = 3/24 + 2/24 240/5 mph = 48 mph. = 5/24 hour. This gives us an average speed of 10mi /.(5/24 hour) Note: that the most common mistake is simply averaging 40 mph and 60 mph for an average speed of 50 mph.
Transcribed Image Text:What is My Slope? Recall that average speed is distance traveled divided by corresponding time elapsed. If the car went 5 miles uphill at 40 mph, it took 5 miles/40 mph = 1/8 hour to travel uphill. %3D If the car went 5 miles downhill at 60 mph, it took 5 miles/60 mph = 1/12 hour to travel downhill. = 10 mi x 24/5 mph = Thus, the car traveled a total of 5 + 5 = 10 miles over 1/8 + 1/12 = 3/24 + 2/24 240/5 mph = 48 mph. = 5/24 hour. This gives us an average speed of 10mi /.(5/24 hour) Note: that the most common mistake is simply averaging 40 mph and 60 mph for an average speed of 50 mph.
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