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viva [34]
3 years ago
8

You don't have to explain

Mathematics
1 answer:
Fynjy0 [20]3 years ago
8 0

DONT BE SO NEGATIVE..............

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The formula for the circumference of a circle is C = 2r, where r is the radius and C is the circumference. The equation solved f
Lubov Fominskaja [6]

Answer:

r = c/2pi

Step-by-step

c= pi*d

d=2r

c = 2*r*pi

6 0
2 years ago
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Food bill: $36 Tip: 20% Sales tax (on food only) 6%
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Answer: To figure out the tip, you need to find 20% of $52.60.

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Step-by-step explanation:

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Angles A and B are located in the first quadrant such that sinA= 7/25 and cosB = 5/13. Determine the exact value for cos (A-B).
fomenos

Answer:

  204/325

Step-by-step explanation:

You can work this a couple of ways. We expect you are probably expected to use trig identities.

  cos(A) = √(1 -sin²(A)) = 24/25

  sin(B) = √(1 -cos²(B)) = 12/13

cos(A -B) = cos(A)cos(B) +sin(A)sin(B) = (24/25)(5/13) +(7/25)(12/13)

  = (24·5 +7·12)/325

cos(A -B) = 204/325

__

The other way to work this is using inverse trig functions. It is necessary to carry the full calculator precision if you want an exact answer.

  cos(A -B) = cos(arcsin(7/25) -arccos(5/13)) = cos(16.2602° -67.3801°)

  = cos(-51.1199°) ≈ 0.62769230 . . . . (last 6 digits repeating)

The denominators of 25 and 13 suggest that the desired fraction will have a denominator of 25·13 = 325, so we can multiply this value by 325 to see what we get.

  325·cos(A-B) = 204

so, the exact value is ...

  cos(A -B) = 204/325

8 0
3 years ago
A climber starts at an elevation of -200 meters and her change in elevation is 300 meters up. What is her final elevation?
kherson [118]

Answer:

100

Step-by-step explanation:

because -100 0 then positive 100      

                     

4 0
2 years ago
What is the expanded form of the series represented below?
34kurt
I think the answer is B
4 0
3 years ago
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