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stich3 [128]
3 years ago
13

Given f(x)=3x-11 which of the following is f(7) A. 10 B. 32 C. -6 D. 6

Physics
2 answers:
jarptica [38.1K]3 years ago
6 0
The answer is A

You substitute 7 in for x which gives you 21 - 11 which equals 10
Crazy boy [7]3 years ago
5 0

Answer:

The answer is A. 10

Explanation:

<em>Given </em>

<em>f(</em><em>x</em><em>)</em><em> </em><em>=</em><em> </em><em>3x </em><em>-</em><em> </em><em>1</em><em>1</em>

<em>So, </em><em> </em>

<em>f(</em><em>7</em><em>)</em><em> </em><em>=</em><em> </em><em>3</em><em> </em><em>*</em><em> </em><em>7</em><em> </em><em>-</em><em> </em><em>1</em><em>1</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>2</em><em>1</em><em> </em><em>-</em><em> </em><em>1</em><em>1</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>1</em><em>0</em>

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The area of a telescope is π * (Diameter / 2) ^2 = π * (Diameter)^2 / 4.

So, for the 20.0 cm telescope, area = π * (20.0cm)^2 / 4.

And for the 5.0 cm telescope, area = π * (5.0 cm)^2 / 4

So, divide both expressions to find the ratio of collection of light of one telescope to the other:=> (20.0)^2 / (5.0)^2 = (20.0 / 5.0)^2 = 4^2 = 16

Then, the 20.0 cm telescope collects 16 times the ligth that the 5.0 cm telescope collect.    <--- answer
5 0
3 years ago
a bullet is dropped from the same height when another bullet is fired horizontally they will hit the ground
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Answer:

At the same time.

Explanation:

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Using second equation of motion,

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In both cases time is same.

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