Tuesday,+February+9,+2010Set3

Assignment: p. 303 # 2, 3, 4, 6, 8, 11, 13

I apologize; I just got caught up in the blizzard! If you get around to it, please post your answer next to your name!


 * 2: Austin

A) 2 points: (0, 64) and (10, 48) 64=a(b)^0 a=64 48=64(b)^10 3/4=b^10 (do each to the 1/10 power) b=.97164 y=64(.97164)^x B) y=64(.97164)^25 y=64(.487...) y=31.18 km/h C) 10=64(.97164)^x 5/32=.97164^x log(5/32)/log(.97164)=x x=64.5, after 64.5 seconds D) E) For negative values, the graph would be increasing in speed exponentially for the more negative the value is. F) It's not very accurate because according to the model he never actually stops, which of course he would.
 * 3: Nico

4a. the equation is y=192((48/192)^(1/20))^x 4b.at 20C it lasts for 48 hours, and at 40C it lasts for 12 hours. and 12 is 1/4th of 48. 4c.at 60C it would last for 3 hours and at 80C it would last for .75 hours. 4d.
 * 4: Davis

(0,1000) and (1,1052) 1000=a(b)^0 a=1000 1052=1000(b)^1 b=1052/1000 a. The equation is: y=1000(1052/1000)^x b. You will find how much money you will have after 10 years by this: y=1000(1052/1000)^10 y=1660 c.1000(1052/1000)^14=2033 It will take 14 years to double your investment
 * 6: Jacob


 * 8: Jeff

A. The equation that I found was I found this by

B. -i. The pressure at 7500 ft = 10.89 psi ii. The pressure at 29000 ft = 4.61psi iii. The pressure at 80000 ft = .60 psi iv. The pressure at 264000 ft or the "edge of space" = .00038 psi

C. The altitude at which you blood would boil would be 69828.80 ft

D. The pressure at -10000 ft = 21.93

y=mx+b y = cents x = number of ounces m = 42/6 = 7 107 = 12(7) + b 107 = 84 + b 23 = b y = 7x + 23 c. This is overpriced by 4 cents. d. 380 = 7x + 23 357 = 7x 51 = x You would expect the box to contain 51 ounces of corn flakes.
 * 11: Jesse

A) p = -5h^2 + 20h + 65 0 = -5h^2 + 20h + 65 -65 = -5h^2 + 20h -65 = -5(h^2 - 4h) -65 = -5(h - 2)^2 -65 - 20 = -5(h - 2)^2 - 20 -85 = -5(h - 2)^2 -5(h - 2)^2 + 85 vertex - (2, 85) the highest grade Mae could get would be 85 after studying for 2 hours B) p = -5(0)^2 + 20(0) +65 p=65 She would get a 65 if she didn't' study at all, this would be the p (or y) incept C) 0 = -5(h - 2)^2 + 85 -85 = -5(h - 2)^2 17 = (h - 2)^2 4.123 = (h - 2) 6.123 = h If Mae studied for 6.123 hours she would receive a zero. Perhaps so much study could result in her being overly confused or tired therefore resulting in failing the test. D)
 * 13: Zander