Find surface area of a sphere with a circumference of 40ft
I came up with 509.3ft^2 does that sound right
Mrs Sue is a idiot
Mrs Sue is a i d i o t
r = c/2pi
a = 4pi*r^2 = 4pi(c/2pi)^2 = c^2/pi = 1600/pi
Steve would you possibly be abe to help me with this one?
Use formula to find the lateral area and surface prism area of the given prism.
height=2m
ends=7m and 7.28m
front=29m
not sure how to explain can give answer choices if that might help;
472m^2;486m^2
443m^2,486m^2
472m^2,479m^2
443m^2,500m^3
The volume of a sphere is 1,476 m (sqr 3). What is the surface area of the sphere to the nearest tenth?
V = (4/3) * pi * r^3
1,476m^(sqr3) = (4/3) * pi * r^3
r^3 = (1,476m^(sqr3) * 3) / (4 pi)
r = 13.8m (rounded to nearest tenth)
A = 4 * pi * r^2
A = 2,389.8m^2 (rounded to nearest tenth)
What is the scale factor of a cube with a volume of 729 m(sqr3)to a cube with a volume 6.859 m(sqr m)?
Let the scale factor be "x".
The volume of the smaller cube is 6.859 m³.
The volume of the larger cube is 729 m³.
Since volume of a cube is proportional to the cube of its side length,
(x * s)^3 = 6.859
s = cuberoot(6.859/x^3)
And,
(x * s)^3 = 729
s = cuberoot(729/x^3)
Equating s,
cuberoot(6.859/x^3) = cuberoot(729/x^3)
(6.859/x^3)^(1/3) = (729/x^3)^(1/3)
6.859^(1/3) / x = 9 / x
x = (6.859^(1/3)) * (1/9)
x ≈ 0.3
Therefore, the scale factor of the cubes is approximately 0.3.