15. Suppose it is found in a research study that the grade in General Mathematics is a function of the amount of study time (in hours) you devote represented by the function $f(x) = 4.38X + 72.9$. If I am aiming for a grade of 95 for General Mathematics, what will be the amount of time I should devote for focused study based on the function? A. 4.56 hours B. 5.04 hours C. 5.27 hours D. 5.73 hours
Added by Mariah T.
Close
Step 1
38x + 72.9, where x represents the amount of study time in hours and f(x) represents the grade in General Mathematics. We want to find the amount of time we should devote for focused study in order to achieve a grade of 95. To do this, we need to solve the Show more…
Show all steps
Your feedback will help us improve your experience
Kumareshwaran Rathinasabapathy and 101 other Algebra educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Hours Studying and Test Scores The number of hours 9 students spent studying for a test and their scores on that test Hours spent studying, x | 0 | 2 | 4 | 5 | 5 | 5 | 6 | 7 | 8 Test scores, y | 40 | 51 | 64 | 69 | 73 | 75 | 93 | 90 | 95 (a) x = 3 hours (b) x = 6.5 hours (c) x = 13 hours (d) x = 4.5 hours
Sheryl E.
1. (9 points) The grade a student receives from the final exam is directly proportional to the two-thirds power of time spent studying for it. (a) Express the grade received as a function of time spent studying, i.e., G = f(t). (b) What is the domain of the function, given the context? (Hint: What does the input variable represent? Which values make sense for the input variable in context?) (c) If a student, who has studied for 8 hours, received 76%, find the proportionality constant. (d) If someone got 88%, how many hours have they studied (round to the nearest hour)?
Hour Studying and Test Scores The number of hours 13 students spent studying for a test and their scores on that test. Hour spent studying: 3 hours, 13 hours, 6 hours, 65 hours, 45 hours.
Madhur L.
Recommended Textbooks
Elementary and Intermediate Algebra
Algebra and Trigonometry
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD