Question

Can someone check my answer

Answer 1

Pyramid A is a square pyramid with a base side length of 12 inches and a height of 8 inches. Pyramid B is a square pyramid with a base side length of 36 inches and a height of 24 inches. How many times bigger is the volume of pyramid B than pyramid A?

Answer 2

9984 is my answer

Answer 3

find the volume of each and then divide the volume of the one the left with the volume of the one of the right... using this formula... V=1/3(l*w*h)...

Answer 4

V=a^2h/3 i though this was the volume of the square pyramid

Answer 5

no, this is wrong formula as far i know,,, i have written the correct formula... solve over that and see what happens...

Answer 6

i never learned doing it your way i only know how to do it the v = a^2h/3 and a = base edge is it ok if you teach me your way?

Answer 7

what you want to ask... tell me... i will guide you...

Answer 8

ok so i just don't know the lenght and the width idk which numbers does are

Answer 9

hmmm ok... here we have the height of this as 8 inches... ok... and the length and base as 12, AS THE PYRAMID IS SQUARE... put these values in the formula and tell me, what you got the value, for the first pyramid...

Answer 10

is this how the first one will look?

Answer 11

yeah... rite... good.. now proceed...

Answer 12

so will it be v = 1/3 (12 x 12 x 8)?

Answer 13

and if that is correct then i got 384

Answer 14

yes... rite... excellent... i also got 384... now solve for the second...

Answer 15

i meant 10368

Answer 16

and this is what i got earlier then i did 10368 - 384 = 9984?

Answer 17

yup mine one is 10368 too... :-)

Answer 18

no... the next step we will have not the subtraction... we here want to find the RATIO... so just 10368/384 = 27... so it means that these have a difference of 27... mean one is 27 TIMES larger than the second one...

Answer 19

ohhhhh ok so i just need to divide and that gave us 27 and i'm not supposed to subtract ok ok i see hat i did wrong btw are you a girl or boy?

Answer 20

yup... we will divide here... :-)

Answer 21

i am a boy... why...?

Answer 22

i was just wondering lol i'm doing a little servey to see who helps more in this site girls or boys

Answer 23

can i get a medal ^.^ and can you help me with others like you did with this one

Answer 24

hmm... i will try... post here... :-)

Answer 25

ok thank you

Answer 26

and what is your gender...

Answer 27

pleasure

Answer 28

An hourglass consists of two sets of congruent composite figures on either end. Each composite figure is made up of a cone and a cylinder.


Each cone of the hourglass has a height of 18 millimeters. The total height of the sand within the top portion of the hourglass is 54 millimeters. The radius of both cylinder and cone is 8 millimeters. Sand drips from the top of the hourglass to the bottom at a rate of 10π cubic millimeters per second. How many seconds will it take until all of the sand has dripped to the bottom of the hourglass?

Answer 29

and i'm a girl

Answer 30

and my asnwer is 268.8?

Answer 31

let me solve ist...

Answer 32

you know what is the formula for the volume of a CONE....?

Answer 33

@shinebrightlikeadimon

Answer 34

yes it's v = pir^2h/3

Answer 35

hmmm yup, its V= 1/3 (pie * r^2 * h)

Answer 36

do you wan me to do it?

Answer 37

here we will have the volume of the cone and it will be (1/3 pi 8^2 * 18) = 64*6* pi...
and the volume of the cylinder is (54-18) * pi * 8^2 = 36*64*pi...
now add up to get 2688 pi... now divide by how fast the sand is leaving: 10 pi mm^3 / sec you get 268.8 secs... so your answer is rite :-)

Answer 38

yay i'm so happy i'm getting these correct btw i have 3 more and i got the answers for them i just need you to check them if you can please? and how old are you

Answer 39

yeah, will try... post here...

Answer 40

i am 22.. and you...?

Answer 41

A snow cone is a tasty treat with flavored ice and a spherical bubble gum ball at the bottom.




The radius of the cone is 1.25 inches, and its height is 2.75 inches. If the diameter of the bubble gum ball is 0.5 inches, what is the closest approximation of the volume of the cone that can be filled with flavored ice?

Answer 42

4.43 in^3 <---- my answer and i'm 13

Answer 43

you know the volume of cone = V= 1/3 (pie * r^2 * h)... and the volume of the bubble gum = V = 4/3 ( pie * r^3)... just put values and the subtract... and see what happens...

Answer 44

i got 8.177?

Answer 45

no... i got here as 4.4320 in^3...

Answer 46

oh lol i i see thats what i got the first time

Answer 47

idk how i got 8.177 the second time

Answer 48

yup that was the correct :-)

Answer 49

you got 8.17 because your calculations were wrong :-)

Answer 50

yah thats probably it lol
thanks if i'm not bothering you i got 2 more and you don't have to help if you don't want to

Answer 51

i will help... post it...

Answer 52

A grain silo is shown below.





What is the volume of grain that could completely fill this silo, rounded to the nearest whole number? Use 22 over 7 for pi.

i got 35654 but in my answer choice 35654 is closest to 35,669 ft^3 so thats what i chose

Answer 53

Volume for shpere=2/3 pi r^3... and Volume for cylinder = pi r^2 h..
put the values and see...

Volume for shpere=2/3 pi r^3...
Volume for cylinder = pi r^2 h

V(total) =(2/3 pi 8^3)/2+(172 pi 8^2) = 535+34565.12 = 35100

Answer 54

@shinebrightlikeadimon

Answer 55

oh i don't have that in my answer choice these are my choices

34,597 ft3

11,532 ft3

35,669 ft3

2,146 ft3

Answer 56

correct answer is 35669.... :-) so we are near to this

Answer 57

ok and i have one more

Answer 58

If the volume for 3-D polyhedra A is 400 cm3 and the volume for 3-D polyhedral B is 800 cm3, what is the percent of change from A to B?


answer 200% idk how but my friend help me with this and got 200% but didn't explain how can you see if she did it correct and explain how for me please

Answer 59

ohh soorry...i have written the formula in correct... see it... i have written Volume for shpere=2/3 pi r^3... and

Answer 60

IT IS 4/3 pi r^3....

Answer 61

for which one?

Answer 62

the cone or cylinder

Answer 63

for the volume of sphere

Answer 64

so our answer was incorrect due to this mistake... put it rite and solve, you will get the rite answer...

Answer 65

ok so what do you want me to do exactly?

Answer 66

JUST make correction in the formula of the previous question and solve then... you will get the rite answer..

Answer 67

the last one question is sooooooooooooooo simple... you know how to find the change in percentages....?

Answer 68

no i don't can you teach me please?

Answer 69

800/400 = 2... and by the definition of percentage...
1=100%
so 2=200%

Answer 70

@shinebrightlikeadimon

Answer 71

but shouldn't it be 200%^3 since the 400 and 800 are cubed?

Answer 72

no... we have the volume... not the length of any side

Answer 73

oh ok ok omg thank you so much you are such a great help and i hope your smartgoal goes up to a 99 because you are smart :)

Answer 74

ahhh thanks.... and so nice of you for your nice comments :-)

Answer 75

you deserved them well i gtg i have soccer practice

Answer 76

ahhh good... enjoy...

Answer 77

for any help tag me in question, i will be there...

Answer 78

i will thank you !

Answer 79

:-)