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Mathematics 15 Online
OpenStudy (anonymous):

This is super confusing >,< fan/medal

OpenStudy (anonymous):

What is the approximate volume of the cone? Use 3.14 for π.

OpenStudy (anonymous):

OpenStudy (anonymous):

A. 1206 cm3 B. 3260 cm3 C. 2170 cm3 D. 6510 cm3

OpenStudy (anonymous):

I'm stomped between A and C

OpenStudy (campbell_st):

the formula for the volume of a cone is \[V = \frac{1}{3} \times \pi \times r^2 \times h\] reading the question you have been told to use \[\pi = 3.14, ~~r = 12~~and~~h = 8\] just substitute and then calculate the answer

OpenStudy (anonymous):

I got 2170

OpenStudy (campbell_st):

wow... that's good as its one of the choices.

OpenStudy (anonymous):

so...I'm correct?

OpenStudy (campbell_st):

I got a different answer so you may need to try again

OpenStudy (anonymous):

ok, hold on real quick

OpenStudy (anonymous):

must of miscalculated or something

OpenStudy (campbell_st):

so its \[V = \frac{3.14 \times 12^2 \times 8}{3}\]

OpenStudy (anonymous):

Now i got this 31795.6

OpenStudy (campbell_st):

ok... \[3.14 \times 12^2 \times 8 =3617.28\] now divide the answer by 3

OpenStudy (anonymous):

I got 1205.76

OpenStudy (anonymous):

@campbell_st

OpenStudy (anonymous):

so It's A

OpenStudy (campbell_st):

that's a lot better

OpenStudy (anonymous):

Am i correct?

OpenStudy (anonymous):

thank you very much

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