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SashulF [63]
3 years ago
9

3. Jada has a coin jar containing n nickels and d dimes worth a total of $3.65. The

Mathematics
1 answer:
Ghella [55]3 years ago
3 0

Answer:

C

Step-by-step explanation:

Here, we want to find an equation in the options which is same as the equation given in the question;

The equation we are testing against is;

0.05n + 0.1d = 3.65

What we can do here is divide through by 0.01

So we will have;

0.05n/0.01 + 0.1d/0.01 = 3.65/0.01

= 5n + 10d = 365

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Given that the measurement is in centimeters, find the area of the circle to the nearest tenth. (Use 3.14 for π)
kvv77 [185]

Answer:

Option D) 254.3 cm2

Step-by-step explanation:

we know that

The area of a circle is equal to

A=\pi r^{2}

we have

r=9\ cm

substitute

A=(3.14)(9)^{2}=254.3\ cm^2

7 0
3 years ago
PLEASE HELP!!!! The problem is in the photo below.
Ratling [72]
Answer :36 explanation: (39x39)-(15-15)=1296 then square root that and get 36
7 0
2 years ago
Lorenzo ate 25 of his bag of almonds. His 4 friends ate equal shares of the remaining bag of almonds. Which expression represent
LiRa [457]

Answer:

(x - 25) / 4

Step-by-step explanation:

In this scenario, we have one unknown variable which is the total of the bag of almonds, therefore we can represent this with the variable x. Since Lorenzo ate 25 of this bag we would need to subtract this from the total of the bag. Then we need to divide the remainder by 4 since each of his friends ate the rest in equal parts. This would leave us with the following expression ...

(x - 25) / 4

3 0
2 years ago
g A researcher wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in Atlanta who own a
Helga [31]

Answer:

The sample size needed is 2401.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error of the interval is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.

We have to find n, for which M = 0.02.

There is no estimate of p available, so we use \pi = 0.5

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.02}

(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.02})^{2}

n = 2401

The sample size needed is 2401.

7 0
3 years ago
Read 2 more answers
I NEED HELP PLEASE !!!Sketch a rectangular prism that has a volume of 36 cubic cm. Label the dimensions of each side on the pris
navik [9.2K]

Answer:

  • Height: 3cm
  • Length: 6cm
  • Width: 2cm

Step-by-step explanation:

To sketch such a Rectangular Prism, all you need to do is to ensure that the product of the dimensions gives 36 cubic cm.

An example is attached:

  • Height: 3cm
  • Length: 6cm
  • Width: 2cm

Volume of a rectangular prism =  Length X Height X Width

=6 X 3 X 2

Volume=36 cubic cm

8 0
3 years ago
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