nininichole431
29.10.2019 •
Mathematics
Preston reads 20 minutes and practices his math facts five minutes each night after several days he have practice math facts for 45 minutes how many minutes the did preston in the same time period
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Ответ:
9 days
Step-by-step explanation:
Divide 45 by 5 as he spends 5 minutes each day and has done a total of 45 minutes.
This gives you 9 days.
Ответ:
Area = ½ • side 1 • sine (B) • side 2
Area = ½ • 9 • sine (140) • 8
Area = ½ • 9 • 0.64279 • 8
Area = 23.14044 square centimeters
Source:
http://www.1728.org/triang.htm