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True [87]
2 years ago
13

» The diameter of a circle is 38 kilometers. What is the circle's area? Use 3.14 for n.

Mathematics
2 answers:
german2 years ago
7 0

Answer:

Use the formula pi×d : 3.14×38 km

So, it's 119.32

(that's what i know)

anyanavicka [17]2 years ago
4 0

The formula for area of a circle is :

Area = pi x radius^2


Radius is half the diameter.

Radius = 38/2 = 19 kilometers


Area = 3.14 x 19^2

Area = 1,133.54 square kilometers

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What is the value of cos θ given that (-2, 9) is a point on the terminal side of θ?
liq [111]

Answer:

a)  cosθ  = \frac{-2\sqrt{85} }{85}

Step-by-step explanation:

<u><em> Step(i):</em></u>-

Given point ( x , y ) = ( - 2 , 3 )

We know that the polar co-ordinates

  x = r cos θ and y = r sinθ

where   r = \sqrt{x^{2} +y^{2} }  

            r = \sqrt{(-2)^{2} +(9)^{2} } = \sqrt{4+81} = \sqrt{85}

<u><em>Step(ii)</em></u>:-

           x = r cos θ

          cosθ   = \frac{x}{r}

      cosθ  = \frac{-2}{\sqrt{85} } = \frac{-2}{\sqrt{85} } X \frac{\sqrt{85} }{\sqrt{85} }

       cosθ  = \frac{-2\sqrt{85} }{85}

3 0
3 years ago
Which of the following is in the solution set of the inequality –28 &lt; v – 16
exis [7]
Let's solve your inequality step-by-step.<span><span>−28</span><<span>v−16</span></span>
Step 1: Flip the equation.<span><span>v−16</span>><span>−28</span></span>
Step 2: Add 16 to both sides.<span><span><span>v−16</span>+16</span>><span><span>−28</span>+16</span></span><span>
v><span>−12</span></span>
Answer:<span>v><span>−<span>12</span></span></span>
6 0
3 years ago
Read 2 more answers
Question 2
BabaBlast [244]
The correct answer is choice d because you would divide x by 2 to get 70. then you do the same with y so 35/2 = 17.5
7 0
3 years ago
What is the answer to 19+x/2=4?
salantis [7]
19+x/2=4
multiply 2 on both sides
19+x=4 times 2
19+x=8
subtract 19 on each side
x=8-19
subtract
x=-11
8 0
3 years ago
Find the slope of the line that passes through (-49, 68) and (-43, 67).
Arte-miy333 [17]

Answer:

Slope = 67 - 68 / -43 + 49

= -1 / 6

= - 1/6

Hope this helps

8 0
3 years ago
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