jeffrieskids13
08.02.2021 •
Mathematics
This morning, Bella took a history test. She got 21 problems right and 49 problems wrong. What percentage did Bella get right?
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Ответ:
42.857142857143%
Step-by-step explanation:
Ответ:
14.4 square units
Step-by-step explanation:
Keep in mind that the area here is a fraction of the area of a full circle of radius 8.
(area of sector) = (fraction)(pi)(8)^2
The fraction is the given central angle (pi over 7) divided by 2pi:
pi 1
* = 1/14
7 2pi
Multiply the formula (fraction)(pi)(8)^2 found above by this fraction:
area of sector = (1/14)(pi)(8)^2 = 14.4 square units