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3 years ago

If a recipe for 24 cookies needs 2 cups of flour, how many cups would we need to make 42 cookies?

Mathematics

1 answer:

TEA [102]3 years ago

6 0

Answer:

3 1/2 cups

Step-by-step explanation:

24=2

42=x

24x=84

/24 /24

3.5

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One pound of gummy bears costs $2.20. How much does 1.6 pounds cost?

vladimir1956 [14]

You have to multiply 2.20 x 1.6 = 3.52

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3 years ago

The sum of two numbers is 24.The difference of their square is 144.what are the two numbers?

dimulka [17.4K]

Answer:

9 and 16

Step-by-step explanation:

let the two numbers are X and Y

X+Y=24

X^2-Y^2=144

solve simultaneously

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3 years ago

.35 convert into pecentage

Whitepunk [10]

.35 as a percentage would be 35%.

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3 years ago

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

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:

$\alpha = \frac{1-0.99}{2} = 0.005$

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

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

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

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0

3 years ago

Evaluate C(n, n).<br><br> A. 0<br> B. 1<br> C. n

horrorfan [7]

$C(n,n)=\dfrac{n!}{n!(n-n)!}=\dfrac1{0!}=\dfrac11=1$

In other words, how many ways are there to choose $n$ objects from a total of $n$ objects? Just one; take all of them at the same time.

4 0

3 years ago