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Hw 20 Percentages and Exponentials

Homework which would help prepare for the exam. (It is pretty short fo...
Course

College Algebra (MATH 8)

51 Documents
Students shared 51 documents in this course
Academic year: 2017/2018
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San José State University

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SJSU Math 08 Homework 20: Percentages and Exponential Functions November 20th Note: just plug in random points to the equation and come up with some (x,y) pairs, and then try to fit some shape to those points. To receive any credit on a quiz or exam, I must see you demonstrate some understanding of the topic whether you use the typical m,h,k chart or if you can state the individual effects of m,h,k (you necessarily need to use the table). Again, no credit is given to the and strategy. Also, when it comes to graphing problems like these, just match your points to the graphs shown and look for the right answer. Actually graph the function on your own paper and then see which picture looks like your graph. There are certain nuances to graphing that are missed if you try to skip the graphing step and simply match your points to the multiple choice answers to save time. On an exam, you will be screwed if you cannot draw these equations freehand. So make sure you can complete the problem in its entirety, without using multiple choice answers to skip any steps. Last thing: be aware of the axes on the graphs. Sometimes the software counted 2 instead of counting 1. 1. Graph the function f (x) 3 1. (a) (b) (c) (d) (c) (d) 2. Graph the function f (x) 4x 4. (a) (b) Page 1 of 6 SJSU Math 08 Homework 20: Percentages and Exponential Functions November 20th 3. Graph the function f (x) 3. (a) (b) (c) (d) NOTE: In the usual formula, represents the percent The actual percentage is given the whole (1 P ) term. Amount Total percentage 1 P New Amount If the question asks for percent then you would solve for the P in (1 P ). If the question just wants an overall percentage, you would report the actual value of (1 P ). 4. The 2015 Oakland Raiders attempted 13 attempts, but only succeeded on 5 of them. The Raiders succeeded on what percentage of their attempts? (a) (b) (c) (d) . 5. The recommended daily dosage of caffeine is 400mg. One oz of coffee contains 12mg of caffeine. Professor Fitch drinks 16oz of coffee per day. What percentage of the recommended daily dosage does Professor Fitch drink? (a) (b) (c) (d) Page 2 of 6 SJSU Math 08 Homework 20: Percentages and Exponential Functions November 20th For questions playing some Starcraft, because Starcraft is the greatest video game ever made (besides Super Smash Brothers Melee). Every time that you win, your score increases every time that you lose, your score decreases 13. You start the day with a score of 300 points. How many points do you have after 3 consecutive wins? (a) 300(.05)3 points (b) 300(1)3 points (c) 300(.10)3 points (d) 300(1)3 points 14. You finish the day with a score of 500 points. How many points did you start with, if you had 2 consecutive wins and then a loss? (a) 500 (1)2 (.05) (b) 500 (1)2 (1) (c) 500 (1)2 (.95) (d) 500 (1)2 (1) points points points points 15. Elvis Presley made in his final year of concerts. Only two decades later, Sugar Ray (the real king of Rock n Roll) made What is the percent increase from Elvis income to earning Sugar Ray money? Use a calculator for this problem. (a) increase (b) increase (c) increase (d) increase Page 4 of 6 SJSU Math 08 Homework 20: Percentages and Exponential Functions Review 16. Suppose f (x) 2(x 1)3 4. Find the inverse function f (y). (a) f (y) (b) f (y) q 2 q 2 3 3 (c) f (y) 3 2 y (d) f (y) 3 2 y For questions let f (x) 2x3 7x2 14x 40. 17. Use the rational roots theorem to give a list of potential for f (x). (a) 2, 3, 15, 20, 40, (b) 2, 4, 5, 8, 10, 20, 40, (c) 2, 6, 8, 12, 16, 20, 40, (d) 2, 3, 8, 15, 20, 40, 18. Give the factored form of f (x). (a) f (x) 2(x 1)(x 3)(x (b) f (x) 2(x 2)(x 3)(x (c) f (x) 2(x 1)(x 4)(x (d) f (x) 2(x 2)(x 4)(x Page 5 of 6 November 20th

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Hw 20 Percentages and Exponentials

Course: College Algebra (MATH 8)

51 Documents
Students shared 51 documents in this course

University: San José State University

Was this document helpful?
SJSU Math 08 Homework 20: Percentages and Exponential Functions November 20th
Note: don’t just plug in random points to the equation and come up with some (x,y) pairs, and
then try to fit some shape to those points. To receive any credit on a quiz or exam, I must see you
demonstrate some understanding of the topic – whether you use the typical m,h,k chart or if you
can state the individual effects of m,h,k (you don’t necessarily need to use the table). Again, no
credit is given to the “guess and check“ T-table strategy.
Also, when it comes to graphing problems like these, don’t just match your points to the graphs
shown and look for the right answer. Actually graph the function on your own paper and then see
which picture looks like your graph.
There are certain nuances to graphing that are missed if you try to skip the graphing step and
simply match your points to the multiple choice answers to save time. On an exam, you will be
screwed if you cannot draw these equations freehand. So make sure you can complete the problem
in its entirety, without using multiple choice answers to skip any steps.
Last thing: be aware of the axes on the graphs. Sometimes the software counted by 2 instead of
counting by 1.
1. Graph the function f(x) = 3 ·2x−4+ 1.
(a) (b) (c) (d)
2. Graph the function f(x) = −2·4x+ 4.
(a) (b) (c) (d)
Page 1 of 6

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