The Postage function. The cost of sending a large envelope via U.S. first-class mail in 2014 was $0.98 for the first ounce and $0.21 for each additional ounce (or fraction thereof). (Source; www.usps.com .) If x represents the weight of a large envelope, in ounces, then p ( x ) is the cost of mailing it, where p ( x ) = $ 0.98 , if 0 < x ≤ 1 , p ( x ) = $ 1.19 , if 1 < x ≤ 2 , p ( x ) = $ 1.40 , if 2 < x ≤ 3 , And so on, up through 13 ounce. The graph of p is show below. Using the graph of the postage function, find each of the following limit, if it exists. lim x → 3 p ( x )
The Postage function. The cost of sending a large envelope via U.S. first-class mail in 2014 was $0.98 for the first ounce and $0.21 for each additional ounce (or fraction thereof). (Source; www.usps.com .) If x represents the weight of a large envelope, in ounces, then p ( x ) is the cost of mailing it, where p ( x ) = $ 0.98 , if 0 < x ≤ 1 , p ( x ) = $ 1.19 , if 1 < x ≤ 2 , p ( x ) = $ 1.40 , if 2 < x ≤ 3 , And so on, up through 13 ounce. The graph of p is show below. Using the graph of the postage function, find each of the following limit, if it exists. lim x → 3 p ( x )
Solution Summary: The author explains that the cost of sending a large envelope via U.S. first-class mail in 2014 was 0.98 for the first ounce and
The cost of sending a large envelope via U.S. first-class mail in 2014 was $0.98 for the first ounce and $0.21 for each additional ounce (or fraction thereof). (Source; www.usps.com.) If x represents the weight of a large envelope, in ounces, then
p
(
x
)
is the cost of mailing it, where
p
(
x
)
=
$
0.98
,
if
0
<
x
≤
1
,
p
(
x
)
=
$
1.19
,
if
1
<
x
≤
2
,
p
(
x
)
=
$
1.40
,
if
2
<
x
≤
3
,
And so on, up through 13 ounce. The graph of p is show below.
Using the graph of the postage function, find each of the following limit, if it exists.
An airplane flies due west at an airspeed of 428 mph. The wind blows in the direction of 41° south of west
at 50 mph. What is the ground speed of the airplane? What is the bearing of the airplane?
428 mph
41°
50 mph
a. The ground speed of the airplane is
b. The bearing of the airplane is
mph.
south of west.
Rylee's car is stuck in the mud. Roman and Shanice come along in a truck to help pull her out. They attach
one end of a tow strap to the front of the car and the other end to the truck's trailer hitch, and the truck
starts to pull. Meanwhile, Roman and Shanice get behind the car and push. The truck generates a
horizontal force of 377 lb on the car. Roman and Shanice are pushing at a slight upward angle and generate
a force of 119 lb on the car. These forces can be represented by vectors, as shown in the figure below. The
angle between these vectors is 20.2°. Find the resultant force (the vector sum), then give its magnitude
and its direction angle from the positive x-axis.
119 lb
20.2°
377 lb
a. The resultant force is
(Tip: omit degree notations from your answers; e.g. enter cos(45) instead of cos(45°))
b. It's magnitude is
lb.
c. It's angle from the positive x-axis is
Find a plane containing the point (3, -3, 1) and the line of intersection of the planes 2x + 3y - 3z = 14
and -3x - y + z = −21.
The equation of the plane is:
Chapter 1 Solutions
Calculus and Its Applications Plus MyLab Math with Pearson eText -- Access Card Package (11th Edition) (Bittinger, Ellenbogen & Surgent, The Calculus and Its Applications Series)
Calculus for Business, Economics, Life Sciences, and Social Sciences (14th Edition)
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