Mathematics, 12.07.2019 06:10 cotyross

Question - a grapefruit is approximately spherical. jane cuts the grapefruit in half and determines that the circumference of the resulting hemisphere is 12π centimeters. what is the surface area of one-half of the cut grapefruit?
a) 72π cm2
b) 108π cm2
c) 180π cm2
d) 432π cm2

Answers: 2

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Answer from: nathansnyder200

B) 108π cm^2

Step-by-step explanation:

We assume the circumference measurement is the same as it would have been before the fruit was cut. In that case, the radius is found from ...

C = 2πr . . . . . . . . . formula relating circumference and radius

12π cm = 2πr . . . . substitute given information

6 cm = r . . . . . . divide by 2π

The surface area of a hemisphere is 3 times the area of the circular face:

S = 3πr^2

S = 3π(6 cm)^2 = 108π cm^2

The surface area of the grapefruit half is 108π cm^2.

Answer from: alexiaaaa234

B) 108π cm2

Step-by-step explanation:

If a grapefruit is approximately spherical and Jane cuts the grapefruit in half and determines that the circumference of the resulting hemisphere is 12π centimeters, the surface area of one-half of the cut grapefruit is 108π cm2.

Formula: 2πr

S = 3π(6 cm)^2

Answer from: Quest

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

Answer from: Quest

the most boring thing ever written

step-by-step explanation:

i am writing something. yes, i plan to make it the most boring thing ever written. i go to the store. a car is parked. many cars are parked or moving. some are blue. some are tan. they have windows. in the store, there are items for sale. these include such things as soap, detergent, magazines, and lettuce. you can enhance your life with these products. soap can be used for bathing, be it in a bathtub or in a shower. apply the soap to your body and rinse. detergent is used to wash clothes. place your dirty clothes into a washing machine and add some detergent as directed on the box. select the appropriate settings on your washing machine and you should be ready to begin. magazines are stapled reading material made with glossy paper, and they cover a wide variety of topics, ranging from news and politics to business and stock market information. some magazines are concerned with more recreational topics, like sports card collecting or different kinds of hairstyles. lettuce is a vegetable.

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Question - a grapefruit is approximately spherical. jane cuts the grapefruit in half and determines...

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