Mathematics, 03.01.2020 22:31 fonsworth5
An architect is planning several stone spheres of different sizes into the landscaping of a public park, and workers who will be applying the finish to the exterior of the spheres need to know the surface area of each sphere. the finishing process costs $92 per square meter. the surface area of a sphere is equal to 4(pi)r2 where r is the radius of the sphere.
how much would it cost to finish a sphere with a 5.50-meter circumference and a 7.85-meter circumference?
a) $900
b) $1200
c) $1800
d) $2800
e) $3200
f) $4500
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