All categories

2 years ago

A circular window has a diameter of 20 inches. What is the area of the window?

Mathematics

1 answer:

mojhsa [17]2 years ago

4 0

Answer:

62.8

Step-by-step explanation:

20 x П =

20 x 3.14 = 62.8

You might be interested in

At the base of a pyramid, a surveyor determines that the angle of elevation to the top is °. At a point meters from the base, th

riadik2000 [5.3K]

Answer:

$\frac{(\sin 18^\circ)}{75} = \frac{(\sin 35^\circ)}{x}$

Step-by-step explanation:

Incomplete question:

$\angle CBD = 53^\circ$

$\angle CAB = 35^\circ$

$AB = 75$

See attachment for complete question

Required

Determine the equation to find x

First, is to complete the angles of the triangle (ABC and ACB)

$\angle ABC + \angle CBD = 180$ --- angle on a straight line

$\angle ABC + 53= 180$

Collect like terms

$\angle ABC =- 53+ 180$

$\angle ABC =127^\circ$

$\angle ABC + \angle ACB + \angle CAB = 180$ --- angles in a triangle

$\angle ACB + 127 + 35 = 180$

Collect like terms

$\angle ACB =- 127 - 35 + 180$

$\angle ACB =18$

Apply sine rule

$\frac{\sin A}{a} = \frac{\sin B}{b}$

In this case:

$\frac{\sin ACB}{AB} = \frac{\sin CAB}{x}$

This gives:

$\frac{(\sin 18^\circ)}{75} = \frac{(\sin 35^\circ)}{x}$

4 0

2 years ago

Read 2 more answers

Paul is 6 times as old as his brother. Paul is 12 years old.how old is his brother?

lara31 [8.8K]

His brother is 2 years old

4 0

2 years ago

Simplify 28y=12x+84 I don't know this

irina1246 [14]

Divide everything by 4 getting:
7y=3x+21
then get all of the variables on one side by subtracting 3x:
7y-3x=21

7 0

2 years ago

Is c+3/5=15 an identity

Mademuasel [1]

No, becuase c has to be a certain number to equal 15

6 0

2 years ago

Write the expression as a single natural logarithm. 2 ln m + 9 ln n=in?

Akimi4 [234]

Answer:

ln (m^2n^9)

Step-by-step explanation:

Rule: ln a + ln b = ln ab

Rule: ln a^n = n * ln a

2 ln m + 9 ln n =

= ln m^2 + ln n^9

= ln (m^2n^9)

= $\ln m^2n^9$

7 0

2 years ago