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prisoha [69]
3 years ago
12

What is the formula for the area of a hemisphere?

Mathematics
1 answer:
kobusy [5.1K]3 years ago
8 0

Answer:

Step-by-step explanation:

If you have a hemispherical object then it has a base which is a circle of radius r. The area of a circle of radius r is π r2 and thus if the hemisphere is meant to include the base then the surface area is 2 π r2 + π r2 = 3 π r2.

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(−2.9)⋅(−2.9)^7 solve and will get 20 pts
-Dominant- [34]
First comes exponents. -2.9 to the 7th power equals −1724.9876309. then multiple by -2.9 and you get 5002.46412961
7 0
4 years ago
Read 2 more answers
A gardener is planting two types of trees: Type A is 4 feet tall and grows at a rate of 24 inches per year. Type B is 5 feet tal
goldenfox [79]
It would take 5 yrs. for both trees to be the same height.
4 0
3 years ago
At what rate must $287.50 be compounded annually for it to grow to $572.86 in 8 years?
UNO [17]
Using the compound interest formula,
572.86=287,50(1+i)^8
(1+i)^8=572.86/287.50=1.992557
1+i=(1.992557)^(1/8)=1.0899996
=> 
i=1.0899996-1=9%

Note: This problem can also be solved in the head using the rule of 72.
Since after 8 years, the amount is roughly doubled, we can say that the interest rate is approximately 72/8=9%
3 0
3 years ago
Math help again please
vovangra [49]
Hey there! :D

First, find the slope. 

m= (y2-y1)/(x2-x1) I'm using points (0,3) and (1,5)

m=(5-3)/(1-0)
m= 2/1
m=2

Now, plug that into point slope. Use point (1,5) m=2

y-y1= m(x-x1)

y-5= 2(x-1)

Distribute. 

y-5=2x-2

Add 5 to both sides.

y=2x+3 == equation of the line in slope intercept form. y=mx+b

I hope this helps!
~kaikers


8 0
4 years ago
The perimeter of a rectangle is 99 ft, and the length is twice the width. what are its dimensions?
Bas_tet [7]

The dimension of the length and width of the rectangle with the given perimeter are 33ft and 16.5ft respectively.

<h3>What are the dimensions of the rectangle?</h3>

Perimeter of rectangle is expressed as;

P = 2( l + w )

Given that;

  • Perimeter P = 99ft
  • Let width w = x
  • Length l = 2x

We substitute into the formular above.

P = 2( l + w )

99ft = 2( x + 2x )

99ft = 2x + 4x

99ft = 6x

x = 99ft/6

x = 16.5ft

Width = x = 16.5ft

Length = 2x = 2( 16.5ft ) = 33ft

Therefore, the dimension of the length and width of the rectangle with the given perimeter are 33ft and 16.5ft respectively.

Learn more about rectangles here: brainly.com/question/27612962

#SPJ1

7 0
2 years ago
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