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2 years ago

Does 1/2 and 2/7 form a proportion

Mathematics

2 answers:

barxatty [35]2 years ago

4 0

Answer:

Step-by-step explanation:

Find a common denominator, and that is 14. So we convert 1/2 into 7/14 and 2/7 to 4/14, and we see it is not proportional.

tatiyna2 years ago

3 0

Answer:

Step-by-step explanation:

1:2=2:7

1/2=2/7

Product of means=1x7=7

Product of extreme=2x2=4

Since 7≠4. Hence, they are not in proportion.

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Help me please!!!!! Thank you

HACTEHA [7]

Answer:

15/2 in³

Step-by-step explanation:

The formula for the vol. of a pyramid

V = (1/3)(area of base)(height of pyramid)

Here, the volume is:

V = (1/3)( [1/2][5 in][9 in] )·(10 in)

= (9/3)(5/2)(10) in³

= 450/6 in³ = 150/2 in³ = 75 in³ Volume of the pyramid

5 0

3 years ago

Read 2 more answers

Of 150 adults selected randomly from one town, 30 of them smoke. Construct a 99% confidence interval for the true percentage of

anyanavicka [17]

Answer:

The 99% confidence interval for the true percentage of all adults in the town that smoke is (0.1159, 0.2841).

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 interval $1-\alpha$ , 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 $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

Of 150 adults selected randomly from one town, 30 of them smoke. This means that $n = 150, p = \frac{30}{150} = 0.2$

99% confidence interval

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.20 - 2.575\sqrt{\frac{0.20*0.80}{150}} = 0.1159$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.20 + 2.575\sqrt{\frac{0.20*0.80}{150}}{119}} = 0.2841$

The 99% confidence interval for the true percentage of all adults in the town that smoke is (0.1159, 0.2841).

3 0

3 years ago

Del taco sells 12 tacos in a taco fiesta for $8.64

jekas [21]

Answer:

PLEASE GIVE BRAINLIST

each total= 103.68

but if you're talking about divided in into the amount of tacos will be:

2.43 each

HOPE THIS HELPED

8 0

3 years ago

How many minutes is 7:43 to 8:41

frez [133]

It is 58 minutes. :]

3 0

3 years ago

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A force of 10 newtons act in a direction 75 above horizontal moving an object 15 meters from (0,0) to (15,0). What is the work d

givi [52]

Answer:

Step-by-step explanation:

i think

4 0

3 years ago

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