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Alja [10]
3 years ago
9

To what place is 220.0 accurate?

Mathematics
1 answer:
natulia [17]3 years ago
5 0
the answer of the question is tens
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Either enter an exact answer in terms of pi or use 3.14 for pi and enter your answer as a decimal
Phantasy [73]

Area of a circle with diameter 14.

That means the radius is r=7 and the area is of course πr²

Answer: 49π

4 0
3 years ago
A marching band wants to raise 20,000 at its annual fundraiser if they sell tickets for 20 a piece how many tickets will they ha
nataly862011 [7]
1000 tickets because you would divide 20000 divided by 20 =1,000
8 0
3 years ago
Tap A can fill 4 pails in 55 seconds.
rewona [7]

Answer:

Below in bold.

Step-by-step explanation:

Work in times to fill 1 pail:-

tap A takes 55/4 seconds

tap B takes 50/3 seconds

Let time to fill one pail be x when filling together, then:

3/50 + 4/55 = 1/x

165x + 200x = 55*50

x = 2750 /(365) = 7.5342 seconds

To fill 16 pails it takes 7.5342* 16

= 120.55 seconds

= 2 minutes 1 second to the nearest second..

7 0
2 years ago
suppose a sample of 1305 tenth graders is drawn. Of the students sampled, 1044 read above the eighth grade level. Using the data
Inessa05 [86]

Answer: (0.771,\ 0.829)

Step-by-step explanation:

Given : Significance level : \alpha: 1-0.99=0.01

Critical value : z_{\alpha/2}=2.576

Sample size : n=1305

The proportion of tenth graders read above the eighth grade level. =p=\dfrac{1044}{1305}=0.8

The confidence interval for population proportion is given by :-

p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.8\pm(2.576)\sqrt{\dfrac{0.8(1-0.8)}{1305}}\\\\\approx0.8\pm0.029\\\\=(0.771,\ 0.829)

Hence, the 99% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.771,0.829) .

4 0
3 years ago
What is the value of x?
Rus_ich [418]

Answer:

x=9

Step-by-step explanation:

2x=x+9

Subtract x from both sides;

2x-x=x+9-x

Simplify;

x=9

7 0
3 years ago
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