2.1A – Introduction to Combinatorics – MATH 120
2.1A – Introduction to Combinatorics – MATH 120

<strong>Math</strong> <strong>120</strong> <strong>Final</strong> <strong>Exam</strong> <strong>Review</strong> Select from the list of numbers all that belong to the specified set. 1) Rational numbers 9, 6, -20, 0, 0 -4 , 16, 2 0 , 0.09 A) 9, -20, 0, 0 , 16, 0.09 B) 6, 16 2 Find the percent change if a quantity changes from P1 to P2. Round your answer to the nearest tenth if appropriate. 2) P1 = $13, P2 = $51 Solve the problem. 3) A comet has a nearly circular orbit around a star with a radius of 347 million miles and requires 7.86 earth years to complete one orbit. Estimate the orbital speed of the comet in miles per hour. Round to the nearest mile per hour. Find the domain and range of the relation. 4) {(-4,-7), (-2,-5), (-6,-8), (-6,-4)} A) D = {-6, -2, -4, 6}; R = {-8, -5, -7, -4} B) D = {-6, -2, -4, -6}; R = {-8, -5, -7, -4} C) D = {-6, -2, -4}; R = {-8, -5, -7, -4} D) D = {-8, -5, -7, -4}; R = {-6, -2, -4} Make a scatterplot of the relation. 5) {(0.29, 0.47),(0.34, 0.31),(0.47, -0.09),(0.28, 0.13),(0.05, -0.67), (0.37, 0.94),(0.62, 0.5),(0.25, 0.09)} Make a line graph of the data. 6) The following table shows the average tuition for one semester at City X College over various years. Use time on the horizontal scale for your line graph. Average College Year Tuition 1980 $1000 1981 1500 1982 2500 1983 3500 1

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