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uncfsu.instructure.com Home - myBronco MyMathLab Homework 201820.MATH 123.DI > Modules» MyLab Math FAYETTEVILLE 201820.MATH123.D1 Sarah Walters 1 3/15/18 9:57 PM Spring Semester 2018 Home Announcements Assignments Discussions Grades 1 People Files Syllabus Modules Conferences Collaborations Chat Smarthinking Homework: Section 3.4 Save Score: 0.43 of 1 pt 6 of 7 (7 complete) HW Score: 91.84%, 6.43 of 7 pts Dashboard 3.4.51 Question Help * $21.75 $0.94843/therm In March 2014, a gas company had the rate schedule shown to the right for natural gas usage in single-family residences. (a) What is the charge for using 30 therms in a month? (b) What is the charge for using 200 therms in a month? (c) Develop a function that models the monthly charge C for x therms of aas Monthly service charge Courses Delivery charge First 40 therms Over 40 therms $0 Natural gas cost Calendar (a) The charge for using 30 therms in a month is S Simplify your answer. Round to the nearest cent.) Inbox Enter your answer in the answer box and then click Check Answer parts remaining Help Clear All Check Answer Previous NextExplanation / Answer
a) charge of using 30 therms in a month
= $ 21.75 + $.94843 ( 30 ) + 0.3789 (30)
= $ 61.5699
b) charge of 200 therms in a month
= $ 21.75 + .5065(200)
= $ 123.05
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