Using the diagram below, what is the length of AC

Mathematics

1 answer:

pogonyaev3 years ago

3 0

9514 1404 393

Answer:

B. 4 mi (the correct answer is marked)

Step-by-step explanation:

Corresponding sides are proportional:

AC/EC = AB/ED

AC = EC×AB/ED = (12 ft)×(7 mi)/(21 ft) = (84/21) mi

AC = 4 mi

_____

There is no need to convert from miles to feet, or vice versa, in this problem. The units of ft/ft cancel, so the resulting units associated with the numerical value are miles. (If the unwanted units don't cancel the proportion is written incorrectly.)

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