Phone Charges The monthly cost C , in dollars, for calls from the United States to Germany on a certain wireless plan is modelled by the function C ( x ) = 0.26 x + 5 , where x is the number of minutes used. What is the cost if you talk on the phone 50 minutes? Suppose that your monthly bill is $ 21.64. How many minutes did you use the phone? Suppose that you budget $ 50 per month for calls to Germany, What is the maximum number of minutes that you can talk? What is the domain of C if there are 30 days in the month?
Phone Charges The monthly cost C , in dollars, for calls from the United States to Germany on a certain wireless plan is modelled by the function C ( x ) = 0.26 x + 5 , where x is the number of minutes used. What is the cost if you talk on the phone 50 minutes? Suppose that your monthly bill is $ 21.64. How many minutes did you use the phone? Suppose that you budget $ 50 per month for calls to Germany, What is the maximum number of minutes that you can talk? What is the domain of C if there are 30 days in the month?
Solution Summary: The author explains how the cost of talking on the phone is modelled by the function C(x)=0.26x+5, where x is the number of minutes used.
Phone Charges The monthly cost
C
,
in dollars, for calls from the United States to Germany on a certain wireless plan is modelled by the function
C
(
x
)
=
0.26
x
+
5
,
where
x
is the number of minutes used.
What is the cost if you talk on the phone
50
minutes?
Suppose that your monthly bill is
$
21.64.
How many minutes did you use the phone?
Suppose that you budget
$
50
per month for calls to Germany, What is the maximum number of minutes that you can talk?
What is the domain of
C
if there are
30
days in the month?
Use the properties of logarithms, given that In(2) = 0.6931 and In(3) = 1.0986, to approximate the logarithm. Use a calculator to confirm your approximations. (Round your answers to four decimal places.)
(a) In(0.75)
(b) In(24)
(c) In(18)
1
(d) In
≈
2
72
Find the indefinite integral. (Remember the constant of integration.)
√tan(8x)
tan(8x) sec²(8x) dx
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