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stepan [7]
3 years ago
12

Suppose that a number written as a decimal has an infinite number of no -repeating digits after the decimal point. What is this

number called?

Mathematics
1 answer:
bekas [8.4K]3 years ago
3 0

Answer:

irrational

are the numbers like 7.55782902..where the numbers aren't repeated

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6. A bank auditor claims that credit card balances are normally distributed, with a mean of $3570
sergejj [24]

Answer:

Probability that their mean credit card  balance is less than $2500 is 0.0073.

Step-by-step explanation:

We are given that a bank auditor claims that credit card balances are normally distributed, with a mean of $3570  and a standard deviation of $980.

You randomly select 5 credit card holders.

Let<em> </em>\bar X<em> = </em><u><em>sample mean credit card balance</em></u>

The z score probability distribution for sample mean is given by;

                                Z =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \mu = population mean credit card balance = $3570

            \sigma = standard deviation = $980

            n = sample of credit card holders = 5

Now, the probability that their mean credit card  balance is less than $2500 is given by = P(\bar X<em> </em>< $2500)

    P(\bar X<em> </em>< $2500) = P( \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{2500-3570}{\frac{980}{\sqrt{5} } } ) = P(Z < -2.44) = 1 - P(Z \leq 2.44)

                                                               = 1 - 0.9927 = 0.0073

The above probability is calculated by looking at the value of x = 2.44 in the z table which has an area of 0.9927.

Therefore, probability that their mean credit card  balance is less than $2500 is 0.0073.

4 0
2 years ago
The price of a flight was increased by 3% to £650. What was the price before the increase? Give your answer to the nearest penny
Marta_Voda [28]

Answer:

£631.07

Step-by-step explanation:

Increasing a value by 3% is the same as taking 103% of it - you have the original price (100%) plus an additional 3% of it. Let's call the original price here p. We're told that after a 3% increase, the price goes up to £650. Put another way: 103% of p is £650. In equation form:

1.03p=650

To solve for p, we can simply divide both sides of our equation by 1.03 to get

p=650/1.03\approx631.07

So our orignal amount, to the nearest penny, was £631.07

6 0
2 years ago
Read 2 more answers
Help ty ty asap!! :&lt; :,
Anna35 [415]

Answer:

Wait

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
123°
zhuklara [117]

Answer:

Supplementary 19

180-123=57

57÷3=19

Check:

123+57=180

8 0
3 years ago
Circle as A diameter of 10 cm what is the circumference use 3.14 For £ and do not round your answer be sure to include the corre
astra-53 [7]

Answer:31.4cm

Step-by-step explanation:

Circumference=2×π×(diameter/2)

Circumference=2×3.14×10/2

Circumference=(2×3.14×5)

Circumference=31.

7 0
3 years ago
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