Second Trig Online Quiz! 2/19/09
- 1. Find the equation of the perpendicular bisector of the segment containing (-9, 11) and (1, 42). Use point-slope form.
A) y - 26.5 = 10/31 (x + 4)
B) y - 26.5 = -10/31 (x - 4)
C) y - 26.5 = -10/31 (x + 4)
D) y + 26.5 = -10/31 (x - 4)
- 2. What is the reference angle for 47π/41?
- 3. The half-life of "Onlinium" is 409 minutes. There is a 17324 pound sample of Onlinium. How much will be left after 2 days? Express your answer rounded correctly to 2 decimal places, and include units please!
- 4. A certain unknown substance is decaying. 78 hours ago, there was 144 grams of it. Now, there is only 4 grams. What is the length of the half-life? Express your answer rounded correctly to 2 decimal places, and include units please!
- 5. A certain unknown substance is decaying. 8 years ago, there was 63 ounces of it. Now there is only 44 ounces remaining. How much will be left 20 years from now? Express your answer rounded correctly to 2 decimal places, and include units please!
- 6. Where are the asymptotes of the 5-point graph of: y = -111 tan 4 (3 ø - π/5) + 17 ?
A) x= π/40 and x = 13π/120
B) x= 3π/40 and x = 13π/40
C) x= -94 and x = -128
D) x= 17π/60 and x = π/60
- 7. A piecewise function f(x) is defined as (-x2 + x) for (x ≤ 3) and (-5x + 4) for (x > 3). What is the range of this function?
A) y E R
B) y ≤ 0.25 and y < -11
C) y ≤ 0.25
D) y ≤ 0.5
- 8. The index of a summation is k=2 to 8 and the argument is k2 + k - 9. What is the sum?
- 9. A circle of terror is spinning at the dazzling rate of 324 RPM. If this were modeled by a sine function, what would the b-value of the equation b? No decimals should appear in your answer.
- 10. An angle in the 3rd quadrant has a cosine value of -44/125. Find the exact tangent value for this angle, no decimals!
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