The data in the table represent the monthly power bills (in dollars) for a homeowner in southern California. a. Enter the data in a graphing utility and use the sinusoidal regression tool (SinReg) to find a model of the form A t = a sin bt + c + d , where A t represents the amount of the bill for month t . ( t = 1 represents January, t = 2 represents February, and so on). b. Graph the data and the resulting function.
The data in the table represent the monthly power bills (in dollars) for a homeowner in southern California. a. Enter the data in a graphing utility and use the sinusoidal regression tool (SinReg) to find a model of the form A t = a sin bt + c + d , where A t represents the amount of the bill for month t . ( t = 1 represents January, t = 2 represents February, and so on). b. Graph the data and the resulting function.
Solution Summary: The author explains how the required model can be given as A(t)=35.4mathrmsin (0.753t+2.18)+92.2.
The data in the table represent the monthly power bills (in dollars) for a homeowner in southern California.
a. Enter the data in a graphing utility and use the sinusoidal regression tool (SinReg) to find a model of the form
A
t
=
a
sin
bt
+
c
+
d
, where
A
t
represents the amount of the bill for month
t
. (
t
=
1
represents January,
t
=
2
represents February, and so on).
3.1 Limits
1. If lim f(x)=-6 and lim f(x)=5, then lim f(x). Explain your choice.
x+3°
x+3*
x+3
(a) Is 5
(c) Does not exist
(b) is 6
(d) is infinite
1 pts
Let F and G be vector fields such that ▼ × F(0, 0, 0) = (0.76, -9.78, 3.29), G(0, 0, 0) = (−3.99, 6.15, 2.94), and
G is irrotational. Then sin(5V (F × G)) at (0, 0, 0) is
Question 1
-0.246
0.072
-0.934
0.478
-0.914
-0.855
0.710
0.262
.
2. Answer the following questions.
(A) [50%] Given the vector field F(x, y, z) = (x²y, e", yz²), verify the differential identity
Vx (VF) V(V •F) - V²F
(B) [50%] Remark. You are confined to use the differential identities.
Let u and v be scalar fields, and F be a vector field given by
F = (Vu) x (Vv)
(i) Show that F is solenoidal (or incompressible).
(ii) Show that
G =
(uvv – vVu)
is a vector potential for F.
University Calculus: Early Transcendentals (4th Edition)
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