Math

CalculusFinite Mathematics and Applied Calculus (MindTap Course List)Grades 62 A productivity formula for a student’s performance on difficult English examination is g = 4 t x − 0.2 t 2 − 10 x 2 ( t < 30 ) , where g is the score the student can expect to obtain, t is the number of hours of study for the examination, and x is the student’s grade-point average. a. For how long should a student with a 3.0 grade-point average study to score 80 on the examination? b. Find d t d x fora student who earns a score of 80, evaluate it when x = 3.0 , andinterpret the result.BuyFind*arrow_forward*

7th Edition

Stefan Waner + 1 other

Publisher: Cengage Learning

ISBN: 9781337274203

Chapter 11.6, Problem 59E

Textbook Problem

**Grades ^{62}** A productivity formula for a student’s performance on difficult English examination is

where *g* is the score the student can expect to obtain, *t* is the number of hours of study for the examination, and *x* is the student’s grade-point average.

**a.** For how long should a student with a 3.0 grade-point average study to score 80 on the examination?

**b.** Find

Finite Mathematics and Applied Calculus (MindTap Course List)

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Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...Ch. 11.1 - In Exercises 1-10, use the shortcut rules to...

Ch. 11.1 - In Exercises 11-16, obtain the derivative dy/dt...Ch. 11.1 - In Exercises 11-16, obtain the derivative dy/dt...Ch. 11.1 - In Exercises 11-16, obtain the derivative dy/dt...Ch. 11.1 - In Exercises 11-16, obtain the derivative dy/dt...Ch. 11.1 - In Exercises 11-16, obtain the derivative dy/dt...Ch. 11.1 - In Exercises 11-16, obtain the derivative dy/dt...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - In Exercises 17-40, find the derivative of the...Ch. 11.1 - 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GE Net Income 2009-2013 The annual net income of...Ch. 11.1 - GE Net Income 20072011 The annual net income of...Ch. 11.1 - Ecology Increasing numbers of manatees (sea...Ch. 11.1 - SAT Scores by Income The following graph shown...Ch. 11.1 - Market Share: Smartphones The following graph...Ch. 11.1 - Market Share: Smartphones The following graph...Ch. 11.1 - What instructions would you give to a fellow...Ch. 11.1 - What instructions would you give to a fellow...Ch. 11.1 - Consider f(x)=x2 and g(x)=2x2 =. 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Carefully explain the...Ch. 11.2 - The cost function for your grand piano...Ch. 11.2 - Give an example of a cost function for which the...Ch. 11.2 - Give an example of a cost function for which the...Ch. 11.2 - If the average cost to manufacture one grand piano...Ch. 11.2 - If your analysis of a manufacturing company...Ch. 11.2 - If the marginal cost is decreasing, is the average...Ch. 11.2 - If the average cost is decreasing, is the marginal...Ch. 11.2 - If a companys marginal average cost is zero at the...Ch. 11.2 - The acceleration of cost is defined as the...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 112 (a) Calculate the derivative of...Ch. 11.3 - In Exercises 13-28, calculate dydx. 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Biology-Reproduction The Verhulst model for...Ch. 11.3 - Biology-Reproduction Another model, the predator...Ch. 11.3 - Embryo Development Bird embryos consume oxygen...Ch. 11.3 - Embryo Developmen Turkey embryos consume oxy- gen...Ch. 11.3 - If f and g are functions of time, and at time t=3,...Ch. 11.3 - If f and g are functions of time, and at time t=2,...Ch. 11.3 - If f and g are functions of time, and at time t=3,...Ch. 11.3 - If f and g are functions of time, and at time t=2,...Ch. 11.3 - You have come across the following in a newspaper...Ch. 11.3 - Your friend says that because average cost is...Ch. 11.3 - Find a demand function q(p) suchthat, at a price...Ch. 11.3 - What must be true about a demand function q(p)...Ch. 11.3 - You and I are both selling a steady 20 T-shirts...Ch. 11.3 - You and I are both selling T-shirts for a steady...Ch. 11.3 - Marginal Product (from the GRE Economics Test)...Ch. 11.3 - Marginal Cost (based on a question from the GRE...Ch. 11.4 - In Exercises 1-50, calculate the derivate of the...Ch. 11.4 - 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The...Ch. 11.4 - Food versus Education The percentage y (of total...Ch. 11.4 - Food versus Recreation The percentage y (of total...Ch. 11.4 - Marginal Revenue The weekly revenue from the sale...Ch. 11.4 - Marginal Revenue The weekly revenue from the sale...Ch. 11.4 - Crime Statistics The murder rate in large cities...Ch. 11.4 - Crime Statistics Following is a quadratic model...Ch. 11.4 - Existing Home Sales The following graph shows the...Ch. 11.4 - Existing Home Sales Leading to the Financial...Ch. 11.4 - Pollution An offshore oil well is leaking oil and...Ch. 11.4 - Mold A mold culture in a dorm refrigerator is...Ch. 11.4 - Budget Overruns The Pentagon is planning to build...Ch. 11.4 - Soap Bubbles The soap bubble I am blowing has a...Ch. 11.4 - Revenue Growth The demand for the Cyberpunk II...Ch. 11.4 - Information Highway The amount of information...Ch. 11.4 - Money Stock Exercises 97100 are based on the...Ch. 11.4 - Money Stock Exercises 97100 are based on the...Ch. 11.4 - Money Stock Exercises 97100 are based on the...Ch. 11.4 - 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Investments If $20,000 is invested in a savings...Ch. 11.5 - The 2003 SARS Outbreak In the early stages of the...Ch. 11.5 - The 2003 SARS Outbreak A few weeks into the deadly...Ch. 11.5 - The 2014 Ebola Outbreak In the first 6 months of...Ch. 11.5 - The 2014 Ebola Outbreak In the first 6 months of...Ch. 11.5 - SAT Scores by Income The following bar graph shows...Ch. 11.5 - SAT Scores by Income The following bar graph shows...Ch. 11.5 - Demographics: Average Age and Fertility The...Ch. 11.5 - Demographics: Average Age and Fertility The...Ch. 11.5 - Epidemics A flu epidemic described in Example 1 in...Ch. 11.5 - Epidemics Another epidemic follows the curve...Ch. 11.5 - Subprime Mortgages during the Housing Bubble...Ch. 11.5 - Subprime Mortgage Debt during the Housing Bubble...Ch. 11.5 - Subprime Mortgages during the Housing Bubble...Ch. 11.5 - Subprime Mortgage Debt during the Housing Bubble...Ch. 11.5 - Population Growth The population of Lower Anchovia...Ch. 11.5 - Population Growth The population of Upper Anchovia...Ch. 11.5 - Radioactive Decay Plutonium 239 has a half-life of...Ch. 11.5 - Radioactive Decay Carbon 14 has a half-life of...Ch. 11.5 - Cellphone Revenues The number of cellphone...Ch. 11.5 - Cellphone Revenues The annual revenue for...Ch. 11.5 - Complete the following: The derivative of e raised...Ch. 11.5 - Complete the following: The derivative of the...Ch. 11.5 - Complete the following: The derivative of 2 raised...Ch. 11.5 - Complete the following: The derivative of the base...Ch. 11.5 - What is wrong with the following?...Ch. 11.5 - What is wrong with the following? ddx22x=(2)22x X...Ch. 11.5 - What is wrong with the following? ddx32x=(2x)32x1...Ch. 11.5 - What is wrong with the following? ddxln(3x21)=16x...Ch. 11.5 - The number N of music downloads on campus is...Ch. 11.5 - The number N of graphing calculators sold on...Ch. 11.5 - Show that the fractional rate of change of the...Ch. 11.5 - Show that the fractional rate of change of f(x) is...Ch. 11.5 - Let A(t) representa quantity growing...Ch. 11.5 - 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Jay Campbell, who...Ch. 11 - Percentage Rate of Change of P/E Ratios Refer to...Ch. 11 - Sales OHaganBooks.com decided that the cubic curve...Ch. 11 - Rising Sea Level Upon some reflection, Marjory...Ch. 11 - Website Activity The number of hits on...Ch. 11 - Website Activity The number of hits on...Ch. 11 - Demand and Revenue The price p that...Ch. 11 - Demand and Revenue The price p that...Ch. 11 - Find limt+N(t) forboth models, and interpret the...

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