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Kazeer [188]
3 years ago
14

I need help please and thank you

Mathematics
1 answer:
yawa3891 [41]3 years ago
5 0

Answer:

A =28.26 ft^2

Step-by-step explanation:

We need to find the radius.  The radius is 1/2 of the diameter

r = d/2 = 6/2 =3

A = pi r^2

A = pi (3)^2

A = pi 9

Using 3.14 for pi

A = 9*3.14

A =28.26 ft^2

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2cot^2(x)-7csc(x)+8=0
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Hello here is a solution : 

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3 years ago
What is the standard error of the sampling distribution of sample proportion?.
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<h3>---</h3>

Hope this helps you! Feel free to give feedback

5 0
2 years ago
Superman needs to save Lois from the clutches of Lex Luther. After flying for 15 seconds, he is 2100 meters from her. Then at 18
posledela

Part A

x = time in seconds that have gone by

y = distance in meters Superman is away from Lois

"After flying for 15 seconds, he is 2100 meters from her" means we have the point (x,y) = (15, 2100)

"at 18 seconds he is 1980 meters from her" tells us we have a second point (x,y) = (18,1980)

--------

Find the slope of the line through these two points

m = (y2-y1)/(x2-x1)

m = (1980-2100)/(18-15)

m = (-120)/(3)

m = -40

The slope is -40 which means Superman is getting 40 meters closer each second. I.e, the distance is dropping 40 meters per second

--------

Use one of the points and the slope to find the y intercept b

y = mx+b

2100 = (-40)*15 + b

2100 = -600 + b

2100+600 = b

b = 2700

This is the starting distance Superman is away from Lois

--------

Since m = -40 and b = 2700, we know the y = mx+b equation becomes y = -40x+2700.

Replace x with s, replace y with m. We now have m = -40s+2700

---------

<h3>Final Answer:  m = -40s+2700</h3>

============================================

Part B

Plug s = 6 into the equation we found for part A. Then simplify.

m = -40s+2700

m = -40*6+2700

m = -240+2700

m = 2460

---------

<h3>Final Answer: 2460 meters</h3>
7 0
3 years ago
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