Some algebra please help me!

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

PLEASE HELP ME! my answers are ( look above) oh and no i didnt just put any random answer these are actually my answers -_-

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  1. Did you have fun guessing on these?

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    bobpursley
  2. Why not show us your work, and we can identify where you went wrong.

    Recall that for a sphere, v = 4/3 πr^3
    for a prism, v = Base * height
    for a pyramid, v = 1/3 Base * height
    for #4,5, you need to describe the solids
    for solids, the ratio of volumes id the cube of the ratio of sides.

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  3. Edward -- please explain how you got the answer for number 3.

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    Ms. Sue
  4. 1. B
    2. A
    3. C
    4. D
    5. A
    6. A
    7. A
    Unit 2. Lesson 10

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  5. HAL
    is incorrect I got a 6/7

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  6. Hal is correct, I got a 6/7 because I trusted @wrong and chose a different answer for the last one, but it was really A. so Hal was completely right. @ wrong must've went to fast and chose the wrong bubble.

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  7. hal and anonymous are usually right. I always use their answer there was only one time where anonymous was wrong but they have help me in math, language art, social studies, ect. and you can ban me for that but I have brainly, quillbot, and 5 computers 2 phone and I never post so you wont know when im cheating

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  8. Hal is completely right
    Thank you

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  9. @Hal is right for unit 1. lesson 10(similar solids) for 8th-grade pre-algebra semester b

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  10. hal is 100%.... brother yous a realest

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  11. Hal is correct

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  12. Hal is 100% right. thanks for the help with the quiz.

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  13. i am about to find out if HAL is right in 3.. 2... 1...yesss dbh2rrfhhsdbe 7/7

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  14. Hal's correct! thank you jiskha

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

    Hal is still correct! 2021 100%

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  16. Hal is still correct! 2021 100%

    and Jonas Hernandez are correct

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  17. Still correct 10 hours after that last person aka @IamSauce and it was useful because I almost got 2 wrong because I read it too fast!
    Glad I checked my answers! TYSM

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  18. HAL is very much right

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  19. Hal is right

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