anonymous
  • anonymous
Geometry? Answer what you can
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
OK
anonymous
  • anonymous
http://prntscr.com/7a9ecl 1 http://prntscr.com/7a9eey 2 http://prntscr.com/7a9ehd 3 17.A rectangular pyramid fits exactly on top of a rectangular prism. The prism has a length of 18 cm, a width of 6 cm, and a height of 9 cm. The pyramid has a height of 15 cm. Find the volume of the composite space figure. (1 point) 504 cm3 1,512 cm3 1,620 cm3 2,592 cm3 18.radius of 70 m (1 point) 4,900 pi m2 19,600 pi m2 9,800 pi m2 14,700 pi m2 19. A spherical balloon has a circumference of 21 cm. What is the approximate surface area of the balloon to the nearest square centimeter? (1 point) 1,385 cm2 561 cm2 346 cm2 140 cm2 21.What is the volume of the sphere? Round the answer to the nearest cubic unit. R= 16 cm http://prntscr.com/7a9evd http://prntscr.com/7a9eza 24.What is the scale factor of a cube with volume 1,331 ft.3 to a cube with volume 85,184 ft.3? 121:1,936 1:64 4:1 1:4
anonymous
  • anonymous
Do I post my answers? I got 1:4 I just need clarification

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is3535
  • is3535
17 is 1,512 cm3
is3535
  • is3535
18 is 19,600 m2
anonymous
  • anonymous
Thank you!! :)
anonymous
  • anonymous
#19 sphere surface area =4*pi* r^2 circumference of 21 cir= 2* pi* r => r=21/(2*pi) area= 4*pi (21/(2*pi))^2= 4 *pi *21^2/pi^2/4=21^2/pi
anonymous
  • anonymous
# 21 volume = 4/3*pi* r^3= 4/3*pi *(16)^3=
anonymous
  • anonymous
17157.284679
anonymous
  • anonymous
# 22 18--> 3 24---->4 so 18/3=6 24/4=6
anonymous
  • anonymous
so 1:6 ?
anonymous
  • anonymous
yes
anonymous
  • anonymous
# 23 do as 22
anonymous
  • anonymous
Also I didn't get 21, can you clarify? by the way thank you so much I appreciate this a lot! I've been stuck on this for a few hours and it's been annoying. I suck at geometry
anonymous
  • anonymous
21 asking about the voulem and the radius is given the equation is =4/3 * pi * r^3
anonymous
  • anonymous
* Volume
anonymous
  • anonymous
thank you! and for 23 I got 1:2.4 Is that right?
anonymous
  • anonymous
you are right
anonymous
  • anonymous
# 24 ?
anonymous
  • anonymous
http://prntscr.com/7a9pib
anonymous
  • anonymous
WHEN U GUYS R DONE DO U MIND HELPING ME CHECK MY ANSWERS
anonymous
  • anonymous
it's 1 am for me and I'm trying to do my work, I'll try if simple.
anonymous
  • anonymous
IT IS grade seven work
anonymous
  • anonymous
# 24 85,184 /1331
anonymous
  • anonymous
Oh okay B, that makes sense
anonymous
  • anonymous
yes
anonymous
  • anonymous
I'm calculating 21 still and end up with B. Is that right? I ended up rounding.
anonymous
  • anonymous
i don't know what is B
anonymous
  • anonymous
nvm I got it, it was c. I see what I did wrong.
anonymous
  • anonymous
are these correct? http://prntscr.com/7a9sr5

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