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Mathematics 38 Online
OpenStudy (sarahc):

Bridget has a kitchen canister, in the shape of a cylinder, which holds flour. If the canister is 20 centimeters wide and 28 centimeters tall, what is its approximate surface area in terms of pi? 560π square centimeters 1,920π square centimeters 760π square centimeters 1,120π square centimeters

OpenStudy (sarahc):

@jim_thompson5910 I got C ?

jimthompson5910 (jim_thompson5910):

you nailed it

jimthompson5910 (jim_thompson5910):

btw, that's the exact surface area...so not sure why they say "approximate surface area", when you're using pi...but oh well

OpenStudy (sarahc):

Haha Idk, some of the questions I get are strange

jimthompson5910 (jim_thompson5910):

yeah if you used 3.14 for pi and you multiplied, then it would be the approximate surface are

jimthompson5910 (jim_thompson5910):

area*

OpenStudy (sarahc):

The cylinder shown below has a radius of 3 inches and a height of 23 inches. What is the approximate lateral area of the cylinder? Use 22/7 for pi. 433.71 in2 490.29 in2 462.00 in2 216.86 in2

OpenStudy (sarahc):

A?

jimthompson5910 (jim_thompson5910):

you got it

jimthompson5910 (jim_thompson5910):

you're on a roll...

OpenStudy (sarahc):

Haha Im not confident in my math skills...but thanks a lot!

jimthompson5910 (jim_thompson5910):

you're welcome, I'd say you're doing just fine if you ask me

OpenStudy (sarahc):

Two similar cylinders are shown in the image below. If the smaller cylinder has a lateral area of approximately 113 square meters, what is the approximate lateral area of the larger cylinder? 48.4 square meters 615.2 square meters 1,435.5 square meters 263.7 square meters

OpenStudy (sarahc):

OpenStudy (sarahc):

B?

jimthompson5910 (jim_thompson5910):

again you are correct

jimthompson5910 (jim_thompson5910):

nice work

OpenStudy (sarahc):

Yay thanks for checking :)

jimthompson5910 (jim_thompson5910):

yw

OpenStudy (sarahc):

The slant height of the cone itself is 4 inches, and the radius of the ice cream scoop on top is 0.75 inches. What is the approximate surface area of the entire ice cream cone with the scoop of ice cream? 4.1π square inches 5.8π square inches 3.6π square inches 4.7π square inches

OpenStudy (sarahc):

a?

jimthompson5910 (jim_thompson5910):

you are correct

OpenStudy (sarahc):

A cone with a radius of 6 feet and a slant height of 13 feet is shown below. What is the surface area of this cone? Use 22/7 for pi. 942.86 square feet 113.14 square feet 245.14 square feet 358.29 square feet

OpenStudy (sarahc):

I got d?

jimthompson5910 (jim_thompson5910):

again you are correct

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