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Varvara68 [4.7K]
3 years ago
8

What is the surface area of a sphere with radius 4?

Mathematics
1 answer:
Verdich [7]3 years ago
7 0

Answer:

SA =64 pi units ^2

Step-by-step explanation:

The surface area of a sphere is given by

SA = 4 pi r^2

SA = 4 * pi * 4^2

SA =64 pi

SA =200.96

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Find the value of x. please help me with my test
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Step-by-step explanation:

180 -angled triangle,

180-56 = 124

124/2 = 62 (each corner of the right triangle)

then find the corner below

the rectangle has right angles on the right side

x = 90-62

= 28

8 0
2 years ago
Mickey gave his little sister a juice box that is 3 inches high, 2 inches wide and 1 inch long. how much juice fits in the juice
Semenov [28]

Answer:

11

Step-by-step explanation:

lh+hw+wl=Answer

3(1)+3(2)+2(1)

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3 years ago
2x to the power of 2 + x = ? When x=9
oee [108]

Answer:

Step-by-step explanation:

2x to the power of 2 + x = ? When x=9

(2x)^2 + x

= 4x^2 + x

When x = 9

= 4(9)^2 + 9

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8 0
3 years ago
Read 2 more answers
34. Lora is thinking of a number. It is less than 50 It is a 2-digit number. 3 is a factor of this number. The sum of its digits
-Dominant- [34]

Answer:

B

Step-by-step explanation:

The number is between 10 and 49

The number is divisible by 3

Let the 10s digit = x

Let the units digit = y

1/3 * (10x + y)  = x + y          multiply both sides by 3

10x + y = 3(x +y)                  remove the brackets.

10x +y = 3x + 3y                  Subtract 3x from both sides

10x - 3x + y = 3y                  Combine\

7x + y = 3y                           Subtract y from both sides.

7x = 3y - y                           Combine

7x = 2y

x can't be very big. Even taking 1/3 will get out of range is you use 6.

Also x should be an even number. The units digit cannot have a fraction in it.

Try making x = 2

7*2 = 2*y

14 = 2y                                Divide by 2

14/2 = y

y = 7

So the number is possibly 27. Let's check it out.

  • The number is between and includes 10 and 49. 27 is between these two endpoints.
  • 27 is divisible by 3
  • 1/3(27) = sum of digits
  • 9 = (2 + 7)

All of the conditions are met. It's B

8 0
2 years ago
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