Page 422 - Basic College Mathematics with Early Integers

S E C T I O N 5.4 I LENGTH: U.S. AND METRIC SYSTEMS OF MEASUREMENT 399

Concept Extensions

Determine whether the measurement in each statement is reasonable. See the second Concept Check in this section.

115. The width of a twin-size bed is 20 meters. 116. A window measures 1 meter by 0.5 meter.

117. A drinking glass is made of glass 2 millimeters thick. 118. A paper clip is 4 kilometers long.

119. The distance across the Colorado River is 120. A model’s hair is 30 centimeters long.
50 kilometers.

Estimate each sum or difference. See the first Concept Check in this section.

121. 5 yd 2 in. 122. 45 ft 1 in.
+ 7 yd 30 in. - 10 ft 11 in.

123. Using a unit other than the foot, write a length that 124. Using a unit other than the meter, write a length
is equivalent to 4 feet. (Hint: There are many that is equivalent to 7 meters. (Hint: There are
possibilities.) many possibilities.)

125. To convert from meters to centimeters, the decimal 126. Explain why conversions in the metric system are
point is moved two places to the right. Explain how easier to make than conversions in the U.S. system
this relates to the fact that the prefix centi of measurement.
1
means .
100

127. An advertisement sign outside Fenway Park in Boston measures 18.3 m by 18.3 m.What is the area of this sign?