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Dimas [21]
3 years ago
11

I need help can somebody help me pls asap

Mathematics
2 answers:
barxatty [35]3 years ago
8 0

Answer: B

Step-by-step explanation:

Just plug that value into the formula for the area of a circle and solve.

formula= A=πr2

Phoenix [80]3 years ago
6 0

Answer:

Yes, i can help the answer is d.

Step-by-step explanation:

The pie chart shows the data of each amount and d. is the answer that will fill and divide by 2 with no remainder

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Decrease 1280 by 67%
blondinia [14]
67% of 1280 is 857.6 substrack it and it's = 422.4
5 0
3 years ago
An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 2 of 2 : S
ziro4ka [17]

Answer:

The 85% onfidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.151, 0.205).

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}.

For this problem, we have that:

Sample of 421 new car buyers, 75 preferred foreign cars. So n = 421, \pi = \frac{75}{421} = 0.178

85% confidence level

So \alpha = 0.15, z is the value of Z that has a pvalue of 1 - \frac{0.15}{2} = 0.925, so Z = 1.44.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 - 1.44\sqrt{\frac{0.178*0.822}{421}} = 0.151

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 + 1.44\sqrt{\frac{0.178*0.822}{421}} = 0.205

The 85% onfidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.151, 0.205).

8 0
2 years ago
????????????????????????
Otrada [13]
I would never know the answer to this question
8 0
3 years ago
Convert 9 days into weeks
Natali [406]

Answer:

1 week= 7 days

number of days= 9

number of weeks= 1 week and 2 days

<em>hope it helps :)</em>

<em>please mark it the brainliest!</em>

7 0
2 years ago
Which of the following is a point-slope equation for a line with the point (-2, 4) and a slope of 3?
never [62]

Answer:

y=3x+10

Step-by-step explanation:

y-4=(x+2)3

y-4=3x+6

y =3x+10

5 0
3 years ago
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