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attashe74 [19]
2 years ago
13

Ms. Trowbridge will receive a 40% discount off her first cell phone bill. Her monthly cell phone plan charges a flat monthly fee

of $25.00 plus $0.20 per minute. If Ms. Trowbridge talks on her cell phone for 300 minutes during the first month of cell phone service, what will be the amount of her first cell phone bill?
A) $34.00
B) $36.00
C) $45.00
D) $51.00
Mathematics
1 answer:
Sholpan [36]2 years ago
8 0

Answer: $51.00

Step-by-step explanation:

Since $0.20 is charged per minutes , that is , the amount charged for 300 minutes will be :

300 x 0.20 = $60

Her monthly cell phone plan charges a flat monthly fee of $25.00 , that is the total amount charged will be

$60 + $25

= $85

There is a 40% discount , then we have

40% of $85

= $34

So, the amount of her first cell phone bill = $85 - $34

= $51.00

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Answer:

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When we calculate a confidence interval with an unknown population standard deviation, we estimate it from the sample standard deviation and use the t-score instead of the z-score.

The critical value for t depends on the level of confidence and the degrees of freedom.

If the sample size is 42, the degrees of freedom are:

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For a confidence level of 99% and 41 degrees of freedom, the critical value of t is t=2.701.

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Answer:

3.5 sips

Step-by-step explanation:

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2 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
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Explicación paso a paso:

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f (x) es el número de personas que deben ir

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x = -b / 2a

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Sustituir;

x = -80/2 (-2)

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Answer:

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