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Vladimir [108]
3 years ago
14

I'm not really 100% sure on how to do this??

Mathematics
1 answer:
Cloud [144]3 years ago
7 0
XPY is the circumference minus XY

the angle of arc XY is 90 degrees

a full revolution of a circle is 360 degrees

the distance XY is 1/4 of the circumference of the circle

the circumference of a circle is C=2 pi r

r is 10m

the circumference is 20 pi

1/4 of 20 is 5

the distance of arc XY is 5 pi

20pi - 5 pi = 15 pi
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The ratio of the side lengths of a quadrilateral is 3:3:5:8, and the perimeter is 380cm. What is the measure of the longest side
castortr0y [4]

Answer:

160

Step-by-step explanation:

Add the ratios together to get the sum of them is 19.  Since the perimeter is 380, divide 380 by 19 to get 20.  

The shortest side is 3(20) = 60,

the next side is 5(20) = 100, and

the longest side is 8(20) = 160

3 0
2 years ago
The surface area, S, of a sphere of radius r feet is S = S(r) = 4πr^2. Find the instantaneous rate of change of the surface area
8090 [49]
Instantaneous rate of change = S'(r) = 8πr
S'(8) = 8π(8) = 64π

Therefore, the instantaneoud rate of change of the <span>surface area with respect to the radius r at r = 8</span>  is 64π
7 0
3 years ago
Jade is thinking of a number. 3/4 of 200 is the same as 1/8 of her number. What number is she thinking of?
lorasvet [3.4K]

Answer:

1200

Step-by-step explanation:

3/4 of 200 = 150

150 is 1/8 of 1200

5 0
3 years ago
Read 2 more answers
Theresa earned scores of 88 points, 84 points, 88 points, and 91 points on four tests. What is the lowest score she can get on t
Yanka [14]
So u will do 88+84=172+88=260+91=351 and that is all four tests added up now u have to divide the answer by 4 because it was four tests averages
351/4=87.75 wich is aproxamately 88 
so with all four of them added wich is 351 u will add the answer choices so 351+96=447/5=89.4 wich is aproxamately 89
351+97=448/5=89.6 wich is aproxamately 90
351+98=449/5=89.8 wich is aproxamately 90
351+99=450/5=90
so i would say that 99 points is the one she needs to score because it isnt asking for aproxamately 
so it is 99 points
6 0
2 years ago
Read 2 more answers
The next number in the series 13, 18, 16, 21, 19, is:  <br> 22<br> 23<br> 24<br> 25<br> 26 ...?
Lesechka [4]
I think the best option is 24.

7 0
2 years ago
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