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Sergio039 [100]

3 years ago

14

Nancy has a phone plan that she pays $60 a month for. She gets 30 GB of data included, but if she goes over, she gets charged an

additional $3.95 per GB. If her bill comes out to $87.65, how much data did she use in all?
(Just write the number in the answer box)

2 answers:

tigry1 [53]3 years ago

8 0

Answer:

37 GB

Step-by-step explanation:

neonofarm [45]3 years ago

6 0

87.65-60=27.65
27.65/3.95=7
Answer=7

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What is the first step in solving 3=r/10

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Answer:

multiply both sides by ten

Step-by-step explanation:

eliminate the ten by doing the opposite (x10 is the opposite of /10). and then you get the answer 30=r

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3.14 The waiting time, in hours, between successive speeders spotted by a radar unit is a continuous random variable with cumula

vovangra [49]

Answer:

(a) The probability of waiting less than 12 minutes between successive speeders using the cumulative distribution function is 0.7981.

(b) The probability of waiting less than 12 minutes between successive speeders using the probability density function is 0.7981.

Step-by-step explanation:

The cumulative distribution function of the random variable <em>X, </em>the waiting time, in hours, between successive speeders spotted by a radar unit is:

$F(x)=\left \{ {{0;\ x$

(a)

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$12\ \text{minutes}=\frac{12}{60}=0.20\ \text{hours}$

The probability is:

$P(X$

$=(1-e^{-8x})|_{x=0.20}\\\\=1-e^{-8\times 0.20}\\\\=0.7981$

Thus, the probability of waiting less than 12 minutes between successive speeders using the cumulative distribution function is 0.7981.

(b)

The probability density function of <em>X</em> is:

$f_{X}(x)=\frac{d F (x)}{dx}=\left \{ {{0;\ x$

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$P(X$

$=8\times [\frac{-e^{-8x}}{8}]^{0.20}_{0}\\\\=[-e^{-8x}]^{0.20}_{0}\\\\=(-e^{-8\times 0.20})-(-e^{-8\times 0})\\\\=-0.2019+1\\\\=0.7981$

Thus, the probability of waiting less than 12 minutes between successive speeders using the probability density function is 0.7981.

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3 years ago

The Washington family had dinner at a restaurant and the bill was $85.00. They gave their server a $13.60 tip. What percent of t

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Step-by-step explanation:

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3 years ago

7) What is the slope of a vertical line ?

nexus9112 [7]

Answer:

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I am joyous to assist you anytime.

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3 years ago

Tom, Ulrika and Harriet each have some money.

Afina-wow [57]

Hey there! I'm happy to help!

Let's represent Tom's money as T, Ulrika's as U, and Harriet's as H. Let's put the information we have in a system of equations and solve the problem.

H=3U (Harriet has 3x as much as Ulrika)

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Since T and U are interchangeable because they are equal, we can replace the U with T to solve for T, which is also the answer for U.

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So, Ulrika has $152.

Have a wonderful day!

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4 years ago