Bartleby Sitemap - Textbook Solutions
All Textbook Solutions for Precalculus (MindTap Course List)
21E22E23E24E25E26E27E28E29E30E31E32E33E34E35E36E37E38E39E40E41E42E43E44E45E46E47E48EFinding a coefficientIn Exercises 47-54, find the coefficient aof the term in the expansion of the binomial. Binomial Term (4xy)10 ax2y850E51E52E53E54E55E56E57E58E59EExpanding an expression In exercises 55-60, use the Binomial Theorem to write the expansion of the expression. (x3/42x5/4)461E62E63E64E65E66E67E68E69E70E71E72E73E74E75E76E77E78E79E80E81E82E83E84E85EElectricity The table shows the average prices f(t) in cents per kilowatt-hour of residential electricity in the United States from 2007 through 2014. Source: U.S. Energy Information Administration Year Average Price, f(t) 2007 10.65 2008 11.26 2009 11.51 2010 11.54 2011 11.72 2012 11.88 2013 12.13 2014 12.52 a) Use the regression feature of a graphing utility to find a cubic model for the data. Let t represent the year, with t=7 corresponding to 2007. b) Use the graphing utility to plot the data and the model in the same viewing window. c) You want to adjust the model so that t=7 corresponds to 2012 rather than 2007. To do this, you shift the graph of f five units to the left to obtain g(t)=f(t+5). Use binomial coefficients to write g(t) in standard form. d) Use the graphing utility to graph g in the same viewing window as f. e) Use both models to predict the average price in 2015. Do you obtain the same answer? f) Do your answers to part e seem reasonable? Explain. g) What factors do you think contributed to the change in the average price?87E88E89E90E91E92E93E94E95E96E97E1CP2CP3CP4CP5CP6CP7CP8CP9CP10CP1E2E3E4E5E6E7E8E9E10E11E12ESkills and Applications Random SelectionIn Exercises 7-14, determine the number of ways a computer can randomly generate one or more such integers from 1 through 12. Two distinct integers whose sum is 914ESkills and Applications Entertainment Systems A customer can choose one of three amplifiers, one of two compact disc players, and one of five speaker models for an entertainment system. Determine the number of possible system configurations.16E17E18E19E20E21E22ESkills and Applications Three-Digit NumbersHow many three-digit numbers are possible under each condition? a The leading digit cannot be zero. b The leading digit cannot be zero and no repetition of digits is allowed. c The leading digit cannot be zero and the number must be a multiple of 5. d The number is at least 400.24E25E26E27E28E29E30E31E32E33E34E35E36E37E38EKidney Donors A patient with end-stage kidney disease has nine family members who are potential kidney donors. How many possible orders are there for a best match, a second-best match and a third best match?40E41E42E43E44E45E46E47E48E49E50E51E52E53E54E55ESkills and Applications Evaluating nCr In Exercises 53-56, use a graphing utility to evaluate nCr. 50C857E58E59E60E61E62E63E64E65E66E67E68E69E70E71E72E73E74E75E76E77E78E79E80E81E82E83E84E85E86E87E88E89E90E91E1CP2CP3CP4CP5CP6CP7CP8CP9CP10CP11CP1E2E3E4EVocabulary In Exercises 1-7, fill in the blanks. Two events A and B from the same sample space are _____ _____ when A and B have no outcomes in common.6E7EVocabulary Match the probability formula with the correct probability name. a Probability of the union of two events i P(AB)=P(A)+P(B) b Probability of mutually exclusive events ii P(A)=1P(A) c Probability of independent events iii P(AB)=P(A)+P(B)P(AB) d Probability of a complement iv P(AandB)=P(A)P(B)9E10ESkills and Applications Finding a Sample Space In Exercises 9-14, find the sample space for the experiment. A taste tester ranks three varieties of yogurt, A, B, and C, according to preference.12E13E14E15E16E17E18E19E20E21E22E23E24E25E26E27E28E29E30E31E32E33E34E35E36E37E38E39E40E41E42E43E44E45E46E47E48E49E50E51ESkills and Applications Probability of a Complement In Exercises 51-54, you are given the probability that an event will happen. Find the probability that the event will not happen. P(E)=0.2853E54ESkills and Applications Probability of a Complement In Exercises 55-58, you are given the probability that an event will not happen. Find the probability that the event will happen. P(E)=0.2956E57E58E59E60E61E62E63E64E65E66E67EHOW DO YOU SEE IT? The circle graphs show the percents of undergraduate students by class level at two colleges. A student is chosen at random from the combined undergraduate population of the two colleges. The probability that the student is a freshman, sophomore, or junior is 81. Which college has a greater number of undergraduate students? Explain.1CR2CR3CR4CR5CR6CR7CR8CR9CR10CR11CR12CR13CR14CR15CRUsing Sigma Notation to Write a Sum In Exercises 15 and 16, use sigma notation to write the sum. 12+23+34+...+91017CR18CR19CR20CR21CR22CR23CR24CR25CR26CR27CR28CR29CR30CR31CR32CR33CR34CR35CR36CR37CR38CR39CR40CR41CR42CR43CR