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spayn [35]
2 years ago
9

Two spheres have volumes of 8,cm and 647 cmIf the surface area of the smaller sphere is 16 cm?, what is the surface

Mathematics
1 answer:
Olegator [25]2 years ago
7 0

Answer:

361.7cm²

Step-by-step explanation:

Volume of sphere 1= 8cm³

=

Volume of sphere 2 = 647cm³

But volume of sphere = 4/3πr³

The radius of sphere 2

647 = 4/3πr³

((3*647)/4)/π= r³

5.36544 = r

Surface area = 4πr²

Surface area for the big sphere

= 4π5.36544²

= 361.7cm²

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Select the correct answer.
masha68 [24]

Answer:

Option C

Step-by-step explanation:

We want to know the percentage of women among people who only prefer exercise.

We have the following information:

                Diet Only      Exercise Only   Diet and Exercise

Men                 7                 28                           15

Women          22                   18                           10

Then we get the total of people who prefer just exercise.

28 + 18 = 46

Now the proportion of women who only prefer exercise is calculated as:

w = \frac{18}{46}\\\\w = 0.39

Therefore we must search among the options the table that shows a proportion of 39 for women who prefer only the exercise.

This table is in option C.

C.

                        Diet Only     Exercise Only         Diet and Exercise

Men                    0.24                  0.61                   0.60

Women             0.76                  0.39                   0.40

3 0
3 years ago
A survey of 20 Middleton residents was done to determine the number of people in each household. The numerical frequencies are s
Bond [772]

Answer:

First one is 9 the second one is 3.75 and the last one is 8

Step-by-step explanation:

I just did it

3 0
3 years ago
Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .
mart [117]

Step 1) Divide the figure into separate shapes

Large rectangle: 8 x 9

Medium rectangle: 4 x 6

Quarter circle: r = 3

Step 2) Find the area of each shape

Large rectangle: A = 8 x 9 = 72

Medium rectangle: A = 4 x 6 = 24

Quarter circle: A = 1/4 x 3.14 x 3^2 = 7.065 + 3 = 10.065

Step 3) Add the areas together

A = 72 + 24 + 10.065 = 106.065 square millimeters (may need to round to 106.07, but rounding not given in the problem)

Hope this helps! :)

3 0
3 years ago
Read 2 more answers
7) 5x – 3y – 4z = 24<br> 5x + 3y + 5z = 27<br> 4x - 3y + 5z = 28
OLEGan [10]

Answer:

Step-by-step explanation:

8 0
3 years ago
andy is wrapping gifts for his family. he ties 25 inches of ribbon around each gift. which function gives the relationship betwe
Vaselesa [24]
The total length of the ribbon used is expressed as r and is a product of the number of gifts (g) and the length of ribbon tied in each gift. This relationship may be expressed by the equation,
                                  r = (25) x (g)
8 0
3 years ago
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