Question

You are baking and run out of an important ingredient. Rather than fire up the car, you decide to use a bicycle. The store is 1/2 mile away. Assume your car gets 30 miles to the gallon.   If every driver on the planet made a similar decision once per week for a year, approximately how much gas would be saved for that year? (As this is an estimate, you may make the arithmetic easier by assuming a year has 50 weeks rather than 52 weeks. What number do you use for 'every driver on the planet'?)

	a.	2 billion gallons
	b.	20,000 gallons
	c.	200,000 gallons
	d.	100 million gallons
	e.	2 million gallons

Answer 1

Population is in billions and approx third part of population we can assume drivers