anonymous
  • anonymous
Algebra 2 :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
http://assets.openstudy.com/updates/attachments/537f4b2be4b098b1daf4c2b9-bookworm1156-1400851289112-mathproblem2.png
anonymous
  • anonymous
What function accurately represents the sine curve for red light?
anonymous
  • anonymous
@jim_thompson5910

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jim_thompson5910
  • jim_thompson5910
what is the period of this trig function?
anonymous
  • anonymous
um idk:(
anonymous
  • anonymous
Is it pi/320?
jim_thompson5910
  • jim_thompson5910
the period is T = 640 since the curve repeats itself every 640 nm use the formula T = 2pi/B T = 2pi/B 640 = 2pi/B B = ???
anonymous
  • anonymous
640/ 2=320
anonymous
  • anonymous
is the answer D?
jim_thompson5910
  • jim_thompson5910
yes you should end up with B = pi/320
jim_thompson5910
  • jim_thompson5910
so that's why the function is \[\Large f(x) = \sin\left(\frac{\pi}{320}x\right)\]
anonymous
  • anonymous
That makes sense! Thank you:)
anonymous
  • anonymous
The temperature of a chemical reaction ranges between 40 degrees Celsius and 180 degrees Celsius. The temperature is at its lowest point when t = 0, and the reaction completes 1 cycle during a 12-hour period. What is a cosine function that models this reaction? f(t) = 70 cos 12t + 110 f(t) = 110 cos 12t + 70 f(t) = −70 cos pi over 6t + 110 f(t) = −110 cos pi over 6t + 70
anonymous
  • anonymous
I got C?
jim_thompson5910
  • jim_thompson5910
which is correct.
anonymous
  • anonymous
Yes! Thanks again :)
anonymous
  • anonymous
Caroline has a rock stuck in her Jeep's tire. If the tire has a 48-inch diameter, how far does the rock travel in 94° of rotation? 188 pi over 15 47 pi over 90 24π 47π
anonymous
  • anonymous
Um I got A?
jim_thompson5910
  • jim_thompson5910
hopefully you used s = (x/360)*2*pi*r s = arc length x = angle in degrees r = radius I'm getting 188pi/15 = 39.374627924992 as well
anonymous
  • anonymous
Yup:) O course!
anonymous
  • anonymous
What are the amplitude, period, phase shift, and midline of f(x) = 7 cos(2x + π) − 3? What are the amplitude, period, phase shift, and midline of f(x) = 7 cos(2x + π) − 3? Amplitude = −3; period: π; phase shift: x = negative pi over 2; midline: y = 3 Amplitude: 7; period: π; phase shift: x = negative pi over 2; midline: y = −3 Amplitude: 7; period: 2π; phase shift: x = pi over 2; midline: y = 3 Amplitude: −3; period: 2π; phase shift: x = pi over 2; midline: y = −3
anonymous
  • anonymous
B?
jim_thompson5910
  • jim_thompson5910
correct again, you're on a roll
anonymous
  • anonymous
hahaaha!! Thanks <3 for all you're help!

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