10/100 x 2000 = 200
2000-200 = 1800
then it decreases by 20% so
20/100 x 1800 = 360
1800-360 = 1440
im not sure about this part
25% of 2000
25/100 x 2000 = 500
so 1440 + 500 = 1940
Answer:
1/2, 1/3, 1/4, 1/5, 1/6
Step-by-step explanation:
Answer:



--- y intercept
Step-by-step explanation:
Given:
x = weeks; y = copies
The right parameters are:
After 1 week, 5840 copies were downloaded
After 5 weeks, 13090 copies were downloaded
So, the (x,y) forms are:


Next, we calculate the slope (m) using:




The equation is then calculated using:




To calculate the y intercept, substitute 0 for x



Answer:
Step-by-step explanation:
Answer:
<u><em>y = -190 cos(π t / 120) + 195</em></u>
Step-by-step explanation:
<em>General form of a sinusoidal function: y = A cos(Bt - C) + D
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<em>Now generally a cosine function starts at the maximum value, so to start at the minimum value, flip the cosine function by making it negative.
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<em>A is the amplitude of the curve and will be the radius of the ferris wheel. Therefore, A = 380 / 2 = 190 feet.
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<em>
2π / B is the period of the curve and will be the time to complete one full rotation. The time to complete one full rotation is given as 4 minutes. Convert this into seconds to get period = 4 minutes * (60 seconds / minute) = 240 seconds. Therefore, B = 2π / period = 2π / 240 seconds = π / 120.
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C/B is the phase shift, or horizontal shift of the graph. Since the negative cosine function already starts at the minimum value, there is no phase shift so C/B = 0, meaning C = 0.
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<em>
D is the vertical shift and will be the height of the center of the ferris wheel. Therefore, D = 195 feet.
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<em>
Your final function will be:</em>
<u><em>y = -190 cos(π t / 120) + 195</em></u>