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Arlecino [84]
3 years ago
6

Tim is choosing between two cell phone plans that offer the same amount of free minutes. Cingular's plan charges $39.99 per mont

h with additional minutes costing $0.45. Verizon's plan costs $44.99 with additional minutes at $0.40. How many additional minutes, a, will it take for the two plans to cost the same?
Mathematics
1 answer:
Eduardwww [97]3 years ago
8 0

Answer:

It will take 100 additional minutes for the two plans to cost the same.

Step-by-step explanation:

Tim is choosing between two cell phone plans, Cingular and Verizon. They offer the same amount of free minutes.

Cingular's plan charges $39.99 per month with additional minutes costing $0.45.

Verizon's plan costs $44.99 with additional minutes at $0.40

Let a = the number of additional units that it will take the two plans to cost the same.

This means total cost of Cingular's plan additional minutes will be 0.45a and total cost of Verizon's plan additional minutes will be 0.4a

For the two plans to cost the same,

39.99 + 0.45a = 44.99 + 0.4a

0.45a - 0.4a = 44.99 - 39.99

0.05a = 5

a = 5/0.05 = 100

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2 years ago
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viva [34]

Answer:

<em>500πx³y³z³ </em>

Step-by-step explanation:

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3 years ago
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Lifetime of $1 Bills The average lifetime of circulated $1 bills is 18 months. A researcher believes that the average lifetime i
OLEGan [10]
<h2>Answer with explanation:</h2>

Let \mu be the population mean lifetime of circulated $1 bills.

By considering the given information , we have :-

H_0:\mu=18\\\\H_a:\mu\neq18

Since the alternative hypotheses is two tailed so the test is a two tailed test.

We assume that the lifetime of circulated $1 bills is normally distributed.

Given : Sample size :  n=50 , which is greater than 30 .

It means the sample is large so we use z-test.

Sample mean : \overline{x}=18.8

Standard deviation : \sigma=2.8

Test statistic for population mean :-

z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

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The p-value= 2P(z>2.02)=0.0433834

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6 0
3 years ago
Simplify the expression completely 125 1/3
Roman55 [17]
<h3>I'll teach you how to solve 125 1/3</h3>

---------------------------------------------------

125 1/3

Convert mixed numbers to improper fractions:

125 1/3=

125*3+1/3=

376/3

Your Answer Is 376/3

plz mark me as brainliest :)

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3 years ago
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