133. The volume of a cylinder is given by πr2h, where r is the radius and h is the height of the cylinder. Find the volume of a cylinder that has a radius of 5.6 in. and a height of 9.5 in. Round answer to the nearest hundredth. 134. The volume of a cylinder is given by πr2h, where r is the radius and h is the height of the cylinder. Find the volume of a cylinder that has a radius of 7.5 in. and a height of 5.4 in. Round answer to the nearest hundredth. 135. The percentage increase in nursing school enrollments from the previous year can be modeled by the expression 0.24x3 - 4.02x2 + 18.57x - 12.03, where x is the number of years after 2000. Find the percent increase in enrollments in nursing schools in (a) 2001 and (b) 2004. (Source: American Association of Colleges of Nursing) 136. Use the model in Exercise 135 to determine the percentage increase in nursing school enrollments in (a) 2005 and (b) 2010. You Be the Teacher! Answer each student’s question or correct the error, if any. 137. Clarice: Can you give me a real-life example that would require you to add two real numbers with different signs? 138. Jocelyn: Can you give me a real-life example that would require you to add two negative real numbers? 139. Simplify -162. Zia’s work: -162 = 216 140. Simplify (-4)(-3)2 + 6(-1). Diane’s work: (-4)(-3)2 + 6(-1) = 122 + (-6) = 144 + (-6) =138 141. Brent: What punctuation is needed if I want the first step, in simplifying the following expression, to be to subtract 3 2 and 1? 1 2 a- 5 2 b 2 + 6 ÷ 3 2 - 1 142. Evaluate x2 - 2x for x=-10. AJ’s work: -102 - 2(-10) =-100 - 2(-10) =-102(-10) =-1020 Calculate It! Use a calculator to determine if each expression is simplifi ed correctly. If not, provide the correct value. 143. (-116)(3) - 14(7) 13(-9) - (-84) = 446 33 144. (-11)(12) - 9(-4) 11(-4) - (-16) = 24 7 145. a- 1 3 b 2 a- 1 2 b + 2a4 9 b + 7 = 143 18 146. a5 7 ba- 1 3 b 3 + 3a- 1 6 b + 19 = 7003 378 32 Chapter 1 Real Numbers and Algebraic Expressions
hendricks_intermediate_algebra_1e_ch1_3
To see the actual publication please follow the link above