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aprilpendergrass
22.07.2019 •
Mathematics
! will mark ! what is the area of sector ghj , given that θ = π/4 radians? express your answer in terms of π and as a decimal rounded to the nearest tenth. show your work.
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Ответ:
Find the area of sector GHJ, given that theta = pi/4 radians. Express your answer in terms of pi and rounded to the nearest tenth (given that GH is a radius of 5 cm)
we know that
[area of a circle]=pi*r²
for r=5 cm
[area of a circle]=pi*5²> 25*pi cm²
if 2*pi radians (full circle) has an area of > 25*pi cm²
pi/4 radians> x
x=(pi/4)*25*pi/(2*pi)> x=3.125*pi cm²
rounded to the nearest tenth> x=3.1*pi cm²
the answer is
3.1*pi cm²
Ответ:
2/3 of the time it took Terrence to finish the word search
time for Terrence; 3/4*32 = 24 min
time for Charlotte; 2/3*24= 16 min
therefore it took Charlotte 16 min to finish the wordthx