Do each of the following. First, determine a rough estimate in 5 to 10 seconds.

Question

Do each of the following. First, determine a rough estimate in 5 to 10 seconds. Then determine your best estimate. "Best estimate" means no pencil and paper and ess than 30 seconds or so. Otherwise, we defeat the purpose of estimating!) Then determine the exact answer. Mindy rode her bike 5 times last week. At the beginning of the week, the odometer read 303.4, and at the end of the week it read 315.2. At this rate, how many miles will she ride this year? rough estimate best estimate exact answer mi mi mi

Explanation / Answer

Rough estimate

distance travelled approximately in 5 times is 12

and a year has roughly 50 weeks so, total distance travelled in a year = 12 * 50 = 600 km

Best estimate

distance travelled approximately in 5 times is 12

and a year has roughly 52 weeks so, total distance travelled in a year = 12 * 52 = 624 km

Exact answer

distance travelled approximately in 5 times is 11.8

and a year has roughly 52 weeks so, total distance travelled in a year = 11.8 * 52 = 613.6 km

Assumption here is, every week she is going to ride the bike only 5 times.

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