All categories

3 years ago

A circle is cut from a square piece of cloth, as shown:

1 answer:

7 0

First step to solve it is to find the area for the square (A=l times w), then the area of the circle (A=pi times radius square). Then just subtract the area of the circle from the area of the square. It should equal 2540.72 (round it if needed)

You might be interested in

How do you do number 2

frozen [14]

I vhnkkvcjkkjhjgdwe. cfee dd

8 0

3 years ago

In order to estimate the average time spent on the computer terminals per student at a local university, data were collected fro

VladimirAG [237]

Answer:

Margin of error for a 95% of confidence intervals is 0.261

Step-by-step explanation:

Step1:-

Sample n = 81 business students over a one-week period.

Given the population standard deviation is 1.2 hours

Confidence level of significance = 0.95

Zₐ = 1.96

Margin of error (M.E) = $\frac{Z_{\alpha }S.D }{\sqrt{n} }$

Given n=81 , σ =1.2 and Zₐ = 1.96

Step2:-

 $Margin of error (M.E) = \frac{Z_{\alpha }S.D }{\sqrt{n} }$ 

 $Margin of error (M.E) = \frac{1.96(1.2) }{\sqrt{81} }$ 

On calculating , we get

Margin of error = 0.261

Conclusion:-

Margin of error for a 95% of confidence intervals is 0.261

4 0

3 years ago

Use basic trigonometric identities to simplify the expression: sin (-x) cos (-x) csc (-x) =?

Anestetic [448]

Answer:

$sin (-x) cos (-x) csc (-x) =cos(x)$

Step-by-step explanation:

We know by definition that the cosine is an even function, therefore

$cos (-x) = cos (x)$

We also know that the sin is an odd function, therefore

$sin (-x) = -sin (x)$

By definition:

$cscx = \frac{1}{sinx}.$

Then:

$csc(-x) = \frac{1}{sin(-x)}.$

$csc(-x) = -\frac{1}{sin(x)}.$

Using these trigonometric properties we can simplify the expression

$sin (-x) cos (-x) csc (-x)= -sin(x)cos(x)*(-\frac{1}{sin(x)})\\\\sin (-x) cos (-x) csc (-x)=cos(x)$

7 0

3 years ago

Read 2 more answers

30/10 as a whole number

mrs_skeptik [129]

3.

30 divided by 10 equals 3

7 0

3 years ago

An express train started at its home station. In 3 hours, it was 285 miles away. In 5 hours, it was 475 miles away. How fast was

Sedbober [7]

Answer:

95 mi/hr

Step-by-step explanation:

475/5 = 95

285/3 = 95

6 0

3 years ago