Fluorodeoxyglucose is a derivative of glucose that contains the radionuclide fluorine-18 18 F . A patient is given a sample of this material containing 300 MBq of 18 F (a megabecquerel is a unit of radioactivity). The patient then undergoes a PET scan (positron emission tomography) to detect areas of metabolic activity indicative of cancer. After 174 min, one-third of the original dose remains in the body. a. Write a function of the form Q t = Q 0 e − k t to model the radioactivity level Q t of fluorine-18 at a time t minutes after the initial dose. b. What is the half-life of 18 F ? Round to the nearest minute.
Fluorodeoxyglucose is a derivative of glucose that contains the radionuclide fluorine-18 18 F . A patient is given a sample of this material containing 300 MBq of 18 F (a megabecquerel is a unit of radioactivity). The patient then undergoes a PET scan (positron emission tomography) to detect areas of metabolic activity indicative of cancer. After 174 min, one-third of the original dose remains in the body. a. Write a function of the form Q t = Q 0 e − k t to model the radioactivity level Q t of fluorine-18 at a time t minutes after the initial dose. b. What is the half-life of 18 F ? Round to the nearest minute.
Solution Summary: The author analyzes the model for the quantity of radionuclide fluorine remaining in the patient's body at a time t minutes after being administered by using the exponential decay model.
Fluorodeoxyglucose is a derivative of glucose that contains the radionuclide fluorine-18
18
F
.
A patient is given a sample of this material containing 300 MBq of
18
F
(a megabecquerel is a unit of radioactivity). The patient then undergoes a PET scan (positron emission tomography) to detect areas of metabolic activity indicative of cancer. After 174 min, one-third of the original dose remains in the body.
a. Write a function of the form
Q
t
=
Q
0
e
−
k
t
to model the radioactivity level
Q
t
of fluorine-18 at a time t minutes after the initial dose.
b. What is the half-life of
18
F
? Round to the nearest minute.
1. A bicyclist is riding their bike along the Chicago Lakefront Trail. The velocity (in
feet per second) of the bicyclist is recorded below. Use (a) Simpson's Rule, and (b)
the Trapezoidal Rule to estimate the total distance the bicyclist traveled during the
8-second period.
t
0 2
4 6 8
V
10 15
12 10 16
2. Find the midpoint rule approximation for
(a) n = 4
+5
x²dx using n subintervals.
1° 2
(b) n = 8
36
32
28
36
32
28
24
24
20
20
16
16
12
8-
4
1
2
3
4
5
6
12
8
4
1
2
3
4
5
6
=
5 37
A 4 8 0.5
06
9
Consider the following system of equations, Ax=b :
x+2y+3z - w = 2
2x4z2w = 3
-x+6y+17z7w = 0
-9x-2y+13z7w = -14
a. Find the solution to the system. Write it as a parametric equation. You can use a
computer to do the row reduction.
b. What is a geometric description of the solution? Explain how you know.
c. Write the solution in vector form?
d. What is the solution to the homogeneous system, Ax=0?
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, calculus and related others by exploring similar questions and additional content below.
01 - What Is A Differential Equation in Calculus? Learn to Solve Ordinary Differential Equations.; Author: Math and Science;https://www.youtube.com/watch?v=K80YEHQpx9g;License: Standard YouTube License, CC-BY
Higher Order Differential Equation with constant coefficient (GATE) (Part 1) l GATE 2018; Author: GATE Lectures by Dishank;https://www.youtube.com/watch?v=ODxP7BbqAjA;License: Standard YouTube License, CC-BY