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nexus9112 [7]
3 years ago
9

The diameter of a circle is a chord that _______ passes through the center of the circle.

Mathematics
1 answer:
SashulF [63]3 years ago
5 0
The answer is A. Always.
The diameter of a circle is a line that goes from one side to the other hence passing through the center!
Hope this helped!
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Darryl has written 60 percent, or 12 pages, of his history report. Darryl wants to figure out how many total pages he needs to w
Valentin [98]

Answer:

total pages = 20

Step-by-step explanation:

60% of an unknown number is 12

Let the unknown number (total pages) be x.

60/100 of x = 12

60/100 * x = 12

3/5 x = 12

x = 12 * 5/3

x = 20

8 0
2 years ago
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An unconfined compression test was performed to determine the average strength of concrete cylinders (in psi). It is believed th
Ronch [10]

Answer:

Explained below.

Step-by-step explanation:

(1)

The confidence level is, 91%.

Compute the value of α as follows:

\text{Confidence level}\% =(100-\alpha \%)\\\\91% = 100-\alpha \%\\\\\alpha \%=100-91\%\\\\\alpha \%=9\%\\\\\alpha =0.09

(2)

As the population standard deviation is provided, i.e. <em>σ</em> = 256 psi, the <em>z</em> value would be appropriate.

The <em>z</em> value for α = 0.09 is,

<em>z</em> = 1.69

(3)

Compute the 91% confidence interval as follows:

CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}

     =3000\pm 1.69\cdot\frac{256}{\sqrt{70}}\\\\=3000\pm 51.71\\\\=(2942.29, 3057.71)

(4)

The 91% confidence interval for population mean implies that there is a 0.91 probability that the true value of the mean is included in the interval, (2942.29, 3057.71) psi.

8 0
2 years ago
Jackie drinks a bottle of water and a bottle of orange juice every morning.
igomit [66]

Answer: <u>B, about 280 ounces</u>

16.9 + 15.2 = 32.1

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Not A because she doesn't drink 30 oz she drinks 32.

B is the closest and is rounding both numbers up.

C is false because you don't multiply by 10, you multiply by 7 because of the 7 days in a week.

D is false for the same reason as C.

4 0
2 years ago
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What are the missing angle measures for
Alenkinab [10]
W=148
V=180-148=32
V=32
T=148
S=148
Yes, it is correct
7 0
3 years ago
Find the interest using the formula I = Prt Principal: $1800 Interest Rate: 6.5% Time: 30 months Interest =​
Oliga [24]
I = P r t

I = (1800) (6.5÷100) (30÷12)

I = (1800) ( 0.065) (2.5)

I = 292.50$
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2 years ago
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