The concentration of a drug in the body decreases exponentially after a dosage is given. In one clinical study, adult subjects averaged 13 micrograms/milliliter (mcg/mL) of the drug in their blood plasma 1 hr after a 1000-mg dosage and 3 micrograms/milliliter 4 hr after dosage. a) Find the value k, and write an equation for an exponential function that can be used to predict the concentration of the drug, in micrograms/milliliter, t hours after a 1000-mg dosage. b) Estimate the concentration of the drug 3 hr after a 1000-mg dosage. c) To relieve a fever, the concentration of the drug should go no lower than 2 mcg/mL. After how many hours will a 1000-mg dosage drop to that level? C.... a) k = (Round to three decimal places as needed.)

Q: DEFG ~ PQRS. Find the indicated value. 8. The perimeter of PQRS is 60 inches, and the ratio of 3 the…

A:

Q: Determine whether the triangles are similar. If they are, write a similarity statement. Explain your…

A: 8. Given data is : In ∆PQR and ∆STR Determine whether given triangle is similar ?

Q: 7+7.5 + 8 + 8.5+ ... + 97.5

A:

Q: 3. Hannah's cell phone had 72% battery life remaining when she went to school this morning. During…

A: As per bartleby guidelines, for more than one question asked, only one is to be answered. Kindly…

Q: 9. Find the arc length of the sector if the radius of the circle is 10 and the degree measure of the…

A:

Q: In Exercises 10 and 11, the polygons are similar. Find the value of x. 10. 11. 15 10 6. 1.5 18 2.…

A: Given , polygons are similar , We have to find value of x  (10) Since ,  Polygons are similar then…

Q: Use the crossing-graphs method to solve the given equation. (Round your answer to two decimal…

A: We used GeoGebra to plot the graph. After using Crossing-graph method, we get x = 0.62138

Q: Find the sum. 120 2 (3n – 6) n= 1 The sum is

A:

Q: 12 To sign-up for PearTV you must purchase a PearTV Remote upfront, and then pay $13 per month after…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 4. A group of mountain climbers begin an expedition with 250 pounds of food. They plan to eat a…

A: first of all we will establish linear relationships using the given facts and after that we will use…

Q: 5. Suppose I'm playing a game where I have a 35% chance to win each time. What is the expected…

A: In this set of questions, we will explore some fundamental concepts in statistics and probability.…

Q: The following exercise deals with the homogeneity property. Let f(x) = or 47, How do the function…

A: 4.67

Q: For f(x) = 5x – 1 and g(x) = 5x2 - 1, find the following functions. %3D a. (fo g)(x); b. (g o f)(x);…

A: Given f(x)=5x-1 and g(x)=5x2-1fog(x)=In place of x of f(x) substitute g(x)fog(x)=f(g(x))=5(5x2-1)-1…

Q: The velocity of an object moving along a line is given in the graph below for 0 <t < 8. At t = 0,…

A: Velocity time graph given in the figure.  Initial position=10 Find the position after t=5 And total…

Q: At noon, ship A is 100 km west of ship B. Ship A is sailing south at 40 km/h and ship B is sailing…

A: Use pythogorous theorem

Q: Write the expression as a complex number in standard form. I) (-8 + 8i) – (2 + 4i) 2) (8i) + (-4 -…

A:

Q: 8. Let x be the first column of A and let Show that if Q, is the Householder matrix given by Problem…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Use the graph off to determine each of the following. (a) the domain of f (b) the range of f (c) the…

A:

Q: 3. Find the equation of the line that goes through the point (1, 3, 2) and is parallel to the line…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: For f(x) = 5x - 3 and g(x) = 2x2 – 5, find the following functions. a. (fo g)(x); b. (g o f)(x); c.…

A:

Q: 4 The equation of a line is y = 7x+9. (a) What is the slope of a line parallel to it? (b) What is…

A: Given equation of line: y=49x+9 Then we have to find: a slope of a line parallel to the equation of…

Q: A sprinkler watering a lawn rotates through 120°. The distance from the sprinkler to the farthest…

A: As per our guidelines we are supposed to answer only one question. kindly repost other question as…

Q: 4. Suppose that you work part-time as a sales representative at a car dealership. You earn a base…

A: Note: We will answer the first question only as the exact one is not specified. Please resubmit the…