8. Callie left home at 7:30 AM to bike 8 miles to the school where she teaches. Luckily, she could ride on a bike trail where she averaged 12 miles per hour. But at 7:40 AM her husband Jeff noticed that she had forgotten to take her graded exam papers, which he knew she wanted to return that day. So he hopped on his bike to catch up with her. If he averaged 16 miles per hour, did he catch her before she arrived at school? If so, what time did he catch up with her? (Hint: How far could each ride in 1 minute?)

Q: ecimal:

A: From triangle BDC , BD=18mm,∠DAB=45°,∠DCB=αBA=dAC=b

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.