Math

1) Find the surface area of a sphere with a radius of 8 cm.

A 267.9 cm
B 803.8 cm
C 2143.6 cm
D 2010. cm

2) Find the surface area of a sphere with a radius of 4 ft.

A 452.2 m
B 150.7 m
C 113.0 m
D 904.3 m

3) Find the volume of a sphere with a radius of 4 ft.

A 33.5 ft
B 67.0 ft
C 267.9 ft
D 803.8 ft

4) For the pair of solids, find the value of the variable

A 3 cm
B 18 cm
C 16 cm
D 2 cm

5) For the repair of solids, find the value of the variable

A 12 mm
B 48 mm
C 20 mm
D 3 mm

6) A pyramid has a height of 5 in. And a surface area of 90 in. Find the surface area of a similar pyramid with a height of 10 in. Round to the nearest tenth. if necessary.

A 360 in
B 180 in
C 22.5 in
D 3.6 in

7) A rectangular prism width of 92 ft and a volume of 240 ft. Find the volume of a similar prism with a width of 46 ft. Round to th nearest tenth, if necessary.

A 30 ft
B 40 ft
C 60 ft
D 120 ft

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  1. No ideas? Just to refresh your memory
    volume of sphere = 4/3 πr^3
    area of sphere: 4πr^2
    #4,5 ???
    if there is a linear scale factor of s,
    ...the area changes by a factor of s^2
    ...the volume changes by a factor of s^3

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  2. 1.B
    2.12m2 not 4ft/ 2.=A
    3.C
    4.D
    5.A
    6.A
    7.A
    I got some of these wrong at first then corrected it this is correct.

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  3. Thanks dude

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  4. 1. B
    2. A
    3. C
    4. D
    5. A
    6. A
    7. A

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  5. THX ALOT DUDe

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  6. Thx Hal your right

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