key RELEASED Fall 2015 NC Final Exam Advanced Functions and Modeling
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1 Released Items Public Schools of North arolina State oard of Education epartment of Public Instruction Raleigh, North arolina key Fall 2015 N Final Exam dvanced Functions and Modeling Student ooklet opyright 2015 by the North arolina epartment of Public Instruction. ll rights reserved.
2 1 Suppose the function H(t) = 8.5sin(0.017t 1.5) + 12 models the hours of sunlight for a town in laska, where t = 1 is the first day of the year. ased on the function, what is the approximate range of daylight hours for the town? 0.5 to to to to 19 2 The lifetime of a particular type of car tire is normally distributed. The mean lifetime is 50,000 miles, with a standard deviation of 5,000 miles. Of a random sample of 15,000 tires, how many of the tires are expected to last for between 45,000 and 55,000 miles? 7,125 10,200 14,250 I 14,850 hut make sure calc is in in y highest hours of daylight is 20.5 y µ RIN MOE soooo soooo ,200 65days 180is halfway 2ndwindow change start of table to iso 1 Go to the next page.
3 The frequency table below shows the number of runners in specific age groups for a certain race. ge Group Number of Runners What is the shape of the distribution? uniform skewed right skewed left normal Go to the next page.
4 4 spinner labeled 1 to 9 gives each of the numbers 2, 5, 7, and 9 a chance of 20 being landed upon. The chance of landing on each of the other five numbers is equal. If the spinner is spun 1,000 times, which choice is the most likely outcome for the 1,000 spins? Yao woo 150 O Number on Spinner Number of Occurrences Number on Spinner Number of Occurrences Number on Spinner Number of Occurrences x x x x O O O O x x x x Number on Spinner Number of Occurrences x x x x Go to the next page.
5 5 group of 12 people need to form a line. The line will consist of exactly 9 of the people. Person X and Person Y have to be either third or fourth in line. How many different orders are possible? 79,8,600 O 1,209, ,800 62,880 6 The probability that it will rain on Saturday is 2. The probability that the temperature on Saturday will reach 100 F is 4. The probability that it will rain or 9 reach 100 F on Saturday is 4. What is the probability it will rain and reach 100 F 5 on Saturday? O st 2nd X Y 5th 6th 7th 8th 9th da Rain 1000 Rains 1000 ttal 4 Go to the next page.
6 7 manufacturing plant produces a special kind of lightbulb. Each lightbulb produced has a probability of being defective. Five lightbulbs are chosen at random from the production line. n To the nearest thousandth, what is the probability that exactly two of the five bulbs will be defective? r nc p5cq r p e 96 8 What is the meaning of the base of the function y = log(x)? s y decreases by 1, x increases by a factor of 10. s y decreases by 1, x increases by 10. s y increases by 1, x increases by a factor of 10. s y increases by 1, x increases by 10. a plug in compare values y xry 5 Go to the next page.
7 9 The graph of y = a x is shown below. y Which choice is closest to log a? I toga X a h value +5 x 6 Go to the next page.
8 10 piecewise function is shown below. hx ( ) + + < = 2x + p for x 5 2 2x 5x 10 for 4 x For what value of p will the function be continuous? The equation y = 4.7x is graphed on the coordinate plane. How does increasing the denominator of the exponent transform the graph? O find him for each piece tp 7 6 tp 7 6 Klug in y ps I p 1 The transformed graph will approach a horizontal asymptote while the original graph will not. The transformed graph will not approach a horizontal asymptote while the original graph will. The transformed graph will go to slower than the original graph as the value of x gets larger. The transformed graph will go to faster than the original graph as the value of x gets larger. 7 Go to the next page.
9 12 Which function correctly represents the graph below? y in t c all p padian Mode answer plus choices into y ( x π ) = sin + 4 y ( x π ) = sin y ( x π ) = cos + 4 y ( x π ) = cos x 8 Go to the next page.
10 1 Which function has an amplitude that is twice the size and a period that is three times the size of the function y = cos x ( 1) + 2? 4 y = 6sin 1 12 O + 25 ( x ) x ( ) y = cos x ( ) y = 6 cos x ( ) y = sin plane takes off and travels at an angle of 40 north of east at 110 mph for 2 hours. It then adjusts its path to head 10 west of north and travels in that direction for half an hour at a speed of 100 mph. pproximately how far away is the plane from its starting point? cos 120 calc in punk MOE 182 miles miles 28 miles 249 miles x 2 2,1 2,41 8T 245 b ago µg m 9 Go to the next page.
11 15 Which statement is true about the fifth terms of the two sequences below? 2 Explicit a = n n go b = ( b 6); b = 10 Recursive n n b b b b The fifth term of the recursive sequence exceeds the fifth term of the explicit sequence by 6. The fifth term of the explicit sequence exceeds the fifth term of the recursive sequence by 6. The fifth term of the recursive sequence exceeds the fifth term of the explicit sequence by 21. The fifth term of the explicit sequence exceeds the fifth term of the recursive sequence by Which statement is true about the series shown below? The series converges because r < 1. The series diverges because r < 1. The series converges because r > 1. The series diverges because r > 1. r u5 L 1 convergent 10 Go to the next page.
12 17 What is the explicit form of the equation an = an 1 + 2( n 1); a1 = 1? a an = 2n 1 a 7 2 a = n n + 1 n 2 an n n n = a = n n ay 1 18 n investor bought 1,500 shares of a stock for $6 a share. He estimates the probability that the stock will rise to a value of $25 a share is 24%, and the probability it will fall to $2 a share is 76%. What is the expected value of the investor s profit from buying the stock? $1,560 my ,500 t 6oooo t $9, $6,720 a $2, o , Go to the next page.
13 19 Ferris wheel is designed in such a way that the height (h), in feet, of the seat above the ground at any time, t, is modeled by the function h( t) = sin π t π Radian mode What is the maximum height a seat reaches? 0 55 feet 60 feet 110 feet 115 feet 20 teacher counts the final exam as 25% of each student s class grade. The remaining 75% is the mean of the student s test scores from the semester. Jaleesa s test scores for the semester are 86, 90, 92, and 80. What is the minimum score Jaleesa must get on the final exam to have a class grade of 85.0 or higher? d mean O put in y Look at table Look for highest Y value put ale in 87 25cm t 25x t.am x Go to the next page.
14 21 Two sides of a triangle measure 10 inches and 1 inches. The included angle between these sides is 55. What is the approximate measure of the third side of the triangle? inches oz 11.2 inches 1.9 inches 16.2 inches an a r 22 The third term of a geometric sequence is 96, and the fifth term is 1,56. What is the sum of the first ten terms of this sequence? 4,092 Put calc in egree Mode I ,5 n I 96 an 614 1,572,864 o 2,097,150 F n l 0 64 r,554,400 xii 96 a u 96 16a I 16 a cos XI la 94 1 Go to the next page.
15 This is the end of the dvanced Functions and Modeling Released Items. irections: 1. Look back over your answers for the test questions. 2. Make sure all your answers are entered on the answer sheet. Only what is entered on your answer sheet will be scored.. Put all of your papers inside your test book and close the test book. 4. Place your calculator on top of the test book. 5. Stay quietly in your seat until your teacher tells you that testing is finished. 6. Remember, teachers are not allowed to discuss items from the test with you, and you are not allowed to discuss with others any of the test questions or information contained within the test. 14
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