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3 years ago

How can i change 3.25 into fraction. also how can i change .115 into fraction

Mathematics

2 answers:

bagirrra123 [75]3 years ago

7 0

3.25 equals 3 and 1/4 so it’s 3 1/4

.115 is 115/1000 but simplified is 23/200

hjlf3 years ago

4 0

Answer:

3.25 can be changed to either 3 and 1/4 or 13/4.

.115 can be reduced in a fraction to 23/200

Step-by-step explanation:

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A new television set was recently purchased for the common room in a residence hall for $436.80 including tax the tax rate is 4%

garri49 [273]

Answer:

The price of the television before taxes is $420

Step-by-step explanation:

* Lets explain how to solve the problem

- The purchased price = cost price + taxes

- A new television set was recently purchased for the common room

in a residence hall for $436.80

- This price including tax

- The tax rate is 4%

- We need to find the price of the television before taxes

* <em>Lets solve the problem</em>

- Assume that the price of the television before tax is 100%

∵ The tax rate is 4%

∵ The price after tax = price before tax + tax

∵ The price before tax = 100%

∴ The price after tax = 100% + 4% = 104%

∵ 104% equivalent to $436.80

∴ 100 ⇒ ?

104 ⇒ 436.80

- <em>By using cross multiplication</em>

∴ ? = $\frac{(436.80)(100)}{104}=420$

∴ The price of the television before taxes is $420

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3 years ago

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Nikitich [7]

Answer:

Step-by-step explanation:

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3 years ago

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lina2011 [118]

It is undefined when the denominator is 0

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3 years ago

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A toy manufacturer wants to know how many new toys children buy each year. A sample of 305 children was taken to study their pur

Harrizon [31]

Answer:

The 80% confidence interval for the mean number of toys purchased each year is between 7.5 and 7.7 toys.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.8}{2} = 0.1$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

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$M = z\frac{\sigma}{\sqrt{n}}$

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$M = 1.28\frac{1.5}{\sqrt{305}} = 0.1$

The lower end of the interval is the sample mean subtracted by M. So it is 7.6 - 0.1 = 7.5

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Dafna1 [17]

Answer:

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