(a) If an electric car is capable of going 225 km on a single charge, how many charges will it

step 1 If we have an electric car that can travel on a full charge, 225 kilometers, and it's going a to

(a) If an electric car is capable of going 225 km on a...

(a) If an electric car is capable of going $225 \mathrm{~km}$ on a single charge, how many charges will it need to travel from Seattle, Washington, to San Diego, California, a distance of $1257 \mathrm{mi}$, assuming that the trip begins with a full charge? (b) If a migrating loon flies at an average speed of $14 \mathrm{~m} / \mathrm{s}$, what is its average speed in mi/hr? (c) What is the engine piston displacement in liters of an engine whose displacement is listed as 450 in. ${ }^{3} ?(\mathbf{d})$ In March $1989,$ the Exxon Valdezranagroundand spilled 240,000 barrels of crude petroleum off the coast of Alaska. One barrel of petroleum is equal to 42 gal. How many liters of netroleum were spilled?

(a) If an electric car is capable of going $225 \mathrm{~km}$ on a single charge, how many charges will it need to travel from Seattle, Washington, to San Diego, California, a distance of $1257 \mathrm{mi}$, assuming that the trip begins with a full charge?
(b) If a migrating loon flies at an average speed of $14 \mathrm{~m} / \mathrm{s}$, what is its average speed in mi/hr? (c) What is the engine piston displacement in liters of an engine whose displacement is listed as 450 in. ${ }^{3} ?(\mathbf{d})$ In March $1989,$ the Exxon Valdezranagroundand spilled 240,000 barrels of crude petroleum off the coast of Alaska. One barrel of petroleum is equal to 42 gal. How many liters of netroleum were spilled?

Key Concepts

Rounding Up of Quantities

Rounding up is a technique used when dealing with discrete items or events that cannot be divided. In the context of this problem, when a division yields a fractional result, the answer is rounded up to the next whole number because you cannot have a fraction of an event, such as a full charge or a battery cycle.

Understanding Measurement Units

Understanding measurement units involves recognizing the differences between various systems of measurement, such as the metric system versus the imperial system. It entails the ability to convert and compare units like kilometers and miles or liters and gallons and is essential for solving real-world problems that involve converting and comparing different types of measurements.

Unit Conversion

Unit conversion is the process of converting a measurement from one unit to another, using conversion factors that define the relationship between the units. This concept is crucial when dealing with problems that require consistency in units, such as converting distances from miles to kilometers, speeds from meters per second to miles per hour, or volumes from barrels or cubic inches to liters.

Dimensional Analysis

Dimensional analysis is a method used to check the consistency of equations and perform unit conversions by tracking the units throughout a calculation. It ensures that the final answer has the correct unit and helps in systematically applying conversion factors to translate values from one measurement system to another.

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