Answer:
Area of circle = π r ^ 2
= 3.14 × ( 42) ^ 2
= 5538.96 in^2
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X=10 that how u would get the 12 and the 2
The zero is closed to the origin
Let
x ------> number of switch type A
y -----> number of switch type B
so
Remember that
1 hour=60 min
32 hours=32*60=1,920 minutes
4x+5y=1,920 -------> equation 1
3x+5y=1,740 ------> equation 2
Solve the system of equations
Solve by graphing
using a graphing tool
see the attached figure
Solution is
x=180
y=240
therefore
<h2>the number of switch type A was 180</h2><h2>the number of switch type B was 240</h2>