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BlackZzzverrR [31]
3 years ago
15

The sum of two circles is 80 pi square meters. Find the length of a radius of each circle if one of them is twice as long as the

other. What is the radiusof the larger circle?
The big circle has a radius of - 2r
The small circle has a radius of - r
Never mind u guys didn't help me in enough time i only got a 30% on my TESTTTTTTTT
Mathematics
1 answer:
timurjin [86]3 years ago
3 0

Given:

sum of two circles is 80 pi square meters

big circle has a radius of - 2r
small circle has a radius of – r

Required:

r

Solution:

2r + r = 80 pi square meters

3r = 80 pi square meters

r = 26.67 pi meters

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Mr eliot is extremely careful with his money. He recently invested part of his $150,000 life savings in gold bullion and the res
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Answer:

The amount invested in gold bullion by Mr. Eliot  =   $50,000

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Total amount of savings Me. Eliot ha s = $150,000

Let us assume the amount invested in gold bullion = $m

So, the amount invested in bank = $150,000 - m

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So, the profit in gold bullion  =  0.05 m

and 3% on (150,000 -m)   = \frac{3}{100}  \times  (150,000 -m) = 0.03  (150,000 -m)

= 4,500 - 0.03 m

So, the profit in bank =  4,500 - 0.03 m

Now,  the total profit  = $5,500

⇒Profit from gold bullion + ban = $5,500

⇒0.05 m +  4,500 - 0.03 m = $5,500

or, 0.02 m = 1000

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3 0
3 years ago
HELP PLEASE!! Fast ;))
Tom [10]
What is the volume of the composite figure? (Use for .) Do NOT round your answer

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in- 3
3 0
1 year ago
Read 2 more answers
Can someone solve this question?
Rom4ik [11]

The triangles are isosceles. The following notation are for the angles. For example ABD is refer to the angle located in the B vertex, formed by the segments AB and BD.

ABD = ADB\\40 + 2ADB = 180\\ADB = 70 = ABD\\

70 +  DBC + 30 = 180\\DBC = 180 - 100 = 80

Then

BCD = BCD\\2BCD + 80 = 180\\BCD = 50



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3 years ago
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