Sonya made a resolution to walk 2.5 kilometers a day. On Tuesday she walked 4 times around the running track at the local high school. The chart shows the length of a standard-sized pool and the distance around a standard-sized running track. VenueKilometersPool0.05Running Track0.4How many additional kilometers does Sonya need to walk on Tuesday? Round your answer to the nearest tenth if necessary.
Answer
A
Sonya has to walk an additional 0.5 kilometers on Tuesday.
B
Sonya has to walk an additional 0.9 kilometers on Tuesday.
C
Sonya has to walk an additional 2.3 kilometers on Tuesday.
D
Sonya has to walk an additional 4.1 kilometers on Tuesday.
Explanation
Each lap around the running track is 0.4 kilometers, so 4 laps is 4 × 0.4 = 1.6 kilometers. Sonya’s goal is 2.5 kilometers, leaving 2.5 − 1.6 = 0.9 kilometers to walk. The correct choice is that she has to walk an additional 0.9 kilometers.
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