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4 years ago

HELP PLEASE!!!!!

Mathematics

2 answers:

yawa3891 [41]4 years ago

7 0

Here is what I got:

1-D

2-B

Hope this helps!

8090 [49]4 years ago

6 0

Answer:

Just took the quiz the answers are 1 - C, 2 - A.

Step-by-step explanation:

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What is the square root of 37.

Norma-Jean [14]

Because no perfect squares are factors of 37, the most simplified that the square root of 37 can get is

√37, or approximately 6.08

7 0

4 years ago

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.

zhannawk [14.2K]

Answer:

a) 0.6032

Lower limit: 0.48

Upper limit: 0.72

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

Question a:

In a random sample of 63 professional actors, it was found that 38 were extroverts.

We use this to find the sample proportion, which is the point estimate for p. So

$\pi = \frac{38}{63} = 0.6032$

Question b:

Sample of 63 means that $n = 63$

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 $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6032 - 1.96\sqrt{\frac{0.6032*0.3968}{63}} = 0.4824$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6032 + 1.96\sqrt{\frac{0.6032*0.3968}{63}} = 0.724$

Rounding to two decimal places:

Lower limit: 0.48

Upper limit: 0.72

7 0

3 years ago

20 m 12 m 34 m Find the surface area of this figure

Ad libitum [116K]

Surface area of the fig is 2350.9 sq m (approx).

Step-by-step explanation:

Given,

Diameter = 34 m

so, radius (r) = 17 m

Height of the cylinder (h) = 12 m

Slant height of the cone (l) = 20 m

To find the surface area of the fig

Surface area of the fig = surface area of cylinder + surface area of cone

Formula

Surface area of cylinder = 2πrh

Surface area of cone = πrl

So,

Surface area of cylinder = 2π×17×12 sq m = 408π sq m

Surface area of cone = π×17×20 = 340π sq m

Surface area of the fig = 408π+340π sq m = 748π sq m

= 2350.9 sq m (approx)

8 0

4 years ago

What is the cube root of 27 in rational exponent notation

alina1380 [7]

Answer:

${27}^{ \frac{1}{3} }$

4 0

3 years ago

Will give thanks and brainliest (this is pretty easy). 20 points. click on link

icang [17]

The answer is: " $\frac{7}{2}$ " .
________________________________________________
Explanation:
________________________________________________

(1/6) / (3/7 hr) = x/ 1 hr ;

→ (1/6) / (3/7) = x ;

↔ (1/6) / (3/7) = x ;

→ (1/6) * (7/3) = x ;

The "3" cancels to a "1", and the "6" cancels to a "2" ;

→ { since: " 6 ÷ 3 = 2" ; and since: " 3 ÷ 3 = 1 "} ;
_____________________________________________________
→ And we can rewrite as:

→ (1/2) * (7/1) = (1 * 7) / (2 * 1) = 7/2 ;
_____________________________________________________
The answer is: " $\frac{7}{2}$ " .
_____________________________________________________
Note: The question asks, "At this rate, what "FRACTION" of the distance...?" ;

→ As such, we leave the answer in the "fraction" form.
_____________________________________________________

3 0

3 years ago