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2 years ago

5

Syeda had $80.45 in her bank account on Monday.She deposited $20.50 on Tuesday.She then withdrew $37.25 on Wednesday.How much di

d Syeda have left in her account on Thursday?

1 answer:

Lady_Fox [76]2 years ago

7 0

On Thursday she has $63.70 in her bank account

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39/7 as a mixed number

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39/7
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Vera_Pavlovna [14]

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In a random sample of 45 newborn babies, what is the probability that 40% or fewer of the sample are boys. (Use 3 decimal places

erastova [34]

Answer:

$z= \frac{p- \mu_p}{\sigma_p}$

And the z score for 0.4 is

$z = \frac{0.4-0.4}{\sigma_p} = 0$

And then the probability desired would be:

$P(p$

Step-by-step explanation:

The normal approximation for this case is satisfied since the value for p is near to 0.5 and the sample size is large enough, and we have:

$np = 45*0.4= 18 >10$

$n(1-p) = 45*0.6= 27 >10$

For this case we can assume that the population proportion have the following distribution

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And we want to find this probability:

$P(p$

And we can use the z score formula given by:

$z= \frac{p- \mu_p}{\sigma_p}$

And the z score for 0.4 is

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mafiozo [28]

Answer:

40

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What we need here is to know how many of 1 inch are there in 40 inches

This is straightforward, what we need to do here is to imagine having to mark 1 inch length on the ribbon using a mark of a scissors.

What we will notice is that we need to make 40 marks to have exhausted the entire length of the ribbon.

This is obtained by dividing the total 40 by 1 which is 40

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