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Mathematics 8 Online
OpenStudy (isuckatschool43):

Please help me! I will fan and medal you!

OpenStudy (isuckatschool43):

OpenStudy (devonhoward15):

c

OpenStudy (devonhoward15):

times the 2 numbers

OpenStudy (isuckatschool43):

ok. can you help me with a couple more? @Devonhoward15

OpenStudy (devonhoward15):

i can see what i can do

OpenStudy (isuckatschool43):

OpenStudy (4everaddicted2anime):

The formula for a sphere is \[V=\frac{ 4 }{ 3 }\pi r^3\]

OpenStudy (isuckatschool43):

yeah I got 113.1 but thats not an option

OpenStudy (4everaddicted2anime):

To get the answer you need to keep it in terms of pi. In other words, don't multiply pi into the answer and leave it next to the number

OpenStudy (isuckatschool43):

i got 12.56 now, which still isnt an option

OpenStudy (devonhoward15):

its a

OpenStudy (devonhoward15):

the volume =113.1 and than you divide it by 3.14 to get 36.02

OpenStudy (4everaddicted2anime):

Here is what you need to do: \[V=\frac{ 4 }{ 3 }\pi(3)^3\] Now lets simplify the part with the exponent of 3 to get\[V=\frac{ 4 }{ 3 }\pi(27)\] Next lets multiply 27 and the fraction to get\[V=36\pi\]

OpenStudy (isuckatschool43):

oooh i see

OpenStudy (devonhoward15):

thanks

OpenStudy (isuckatschool43):

i have 2 more

OpenStudy (isuckatschool43):

should i open a new question?

OpenStudy (isuckatschool43):

OpenStudy (devonhoward15):

its a... because when you find the angles you see that angles x and z are the same

OpenStudy (isuckatschool43):

yeah i see that

OpenStudy (devonhoward15):

ok good

OpenStudy (isuckatschool43):

ok last one

OpenStudy (isuckatschool43):

OpenStudy (devonhoward15):

srry dont know that one

OpenStudy (isuckatschool43):

ok

OpenStudy (4everaddicted2anime):

The volume of a cylinder formula is: \[V=\pi r^2h\] Here is what you are given V=722.83pi r=4.1 h=? What you have to do is solve for h, so this is what the equation should look like with everything plugged in\[722.83=4.1^2h\] First you need to square 4.1 to get\[722.83=16.81h\] Now you need to divide both sides by 16.81 to get h alone. This should look like\[43=h\]

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