IB Studies Mathematics Name: ________________________________ Ch. 18 Review Exponential Functions Paper 1 Type Questions: The amount of electrical charge, stored in a mobile phone battery is modelled by , where in hours, is the time C, t, for which the battery is being charged. Write down the amount of electrical charge in the battery at = 0. t The line is the horizontal asymptote. Write down the equation of L L. To download a game to the mobile phone, an electrical charge of 2.4 units is needed. Find the time taken to reach this charge. Give your answer correct to the nearest minute. In the trial of a new drug, scientists found that the amount of the drug in the bloodstream decreased over time, according to the model , where is the amount of the drug in the bloodstream in mg per liter (mg l-1) and is the D t time in hours. Write down the amount of the drug in the bloodstream at = 0. t Calculate the amount of the drug in the bloodstream after 3 hours. Use the graphic display calculator to determine the time it takes for the amount of the drug in the bloodstream to decrease to 0.333 mg l-1.
IB Studies Mathematics Name: ________________________________ Ch. 18 Review Exponential Functions Paper 1 Type Questions: The amount of electrical charge, C, stored in a mobile phone battery is modelled by , where t, in hours, is the time for which the battery is being charged. Write down the amount of electrical charge in the battery at t = 0. The line L is the horizontal asymptote. Write down the equation of L. To download a game to the mobile phone, an electrical charge of 2.4 units is needed. Find the time taken to reach this charge. Give your answer correct to the nearest minute. In the trial of a new drug, scientists found that the amount of the drug in the bloodstream decreased over time, according to the model , where D is the amount of the drug in the bloodstream in mg per liter (mg l-1) and t is the time in hours. Write down the amount of the drug in the bloodstream at t = 0. Calculate the amount of the drug in the bloodstream after 3 hours. Use the graphic display calculator to determine the time it takes for the amount of the drug in the bloodstream to decrease to 0.333 mg l-1.
Ch._18_Review.docx