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alexandr402 [8]
3 years ago
14

A sphere has diameter 28 cm. If the diameter is divided by 2, what is the effect on the surface area?

Mathematics
1 answer:
spayn [35]3 years ago
4 0

Answer:

The surface area is divided by 4.

Step-by-step explanation:

Surface area of a sphere is 4πr².

When the diameter is 28 the radius is 14. So: 4π(14)² = 784π

If you cut the diameter in half you get 14. The radius is now 7.

4π(7)² = 196π.

784/4 = 196 so divided by 4.

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Question Progress
marin [14]
51cm / 3 X 5 = 85cm
Jijdididjdidjdjdjd
3 0
3 years ago
The measures of three of the interior angles of a quadrilateral are 60°, 110°, and 90°. What is the measure of the fourth angle
Dmitry_Shevchenko [17]

Answer:

100°

Step-by-step explanation:

all four angles added together total 360°

x = 360° - 60° - 110° - 90°

x = 100°

3 0
3 years ago
F(n)=64+6n<br> complete the recursive formula of f(n).<br> f(1)=?<br> f(n)=f(n-1)+?
Sonja [21]

Step-by-step explanation:

f(1)= 64+6(1)

=64+6

=70.

thus, f(1) = 70

f(n)=f(n-1)+?

1=(1-1)+70

1=0+70

=70-1

=69

6 0
3 years ago
The graph of linear function f passes through the point (1, -9) and has a slope of -3. What is the zero of f ?
den301095 [7]

Answer:

-2

Step-by-step explanation:

The standard equation of a line is y = mx+c

m is the slope

c is the intercept

Given

Slope = -3

Get the intercept c;

Substitute m = -3 and (1, -9) into y = mx+c

-9 = -3(1) + c

-9  = -3 + c

c = -9 + 3

c = -6

The equation becomes

y = -3x + (-6)

y = -3x-6

f(x) = -3x-6

The zero of f occurs at f(x) = 0

0 = -3x-6

3x = -6

x = -6/3

x = -2

Hence the zero of the function is -2

5 0
3 years ago
PLEASE HELP!!
insens350 [35]
Answer:
(x+3), (x-3), and (x+4)

I’m not so sure about the question but I hope this helps
4 0
3 years ago
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