3 years ago

Find the area of the following ellipse.

Mathematics

1 answer:

Karo-lina-s [1.5K]3 years ago

6 0

Answer:

77.72

Step-by-step explanation:

To find the area of an ellipse, you would use the formula a*b times pi. Sub in the numbers, and you will get the area.

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4c^2-8c-1=0 complete the square round to nearest hundredth

olga55 [171]

Move constant to other side
add 1
4c^2-8c=1
divide by 4 to make leading coeficient 1
c^2-2c=1/4
take 1/2 of linear coeficient and square it
-2/2=-1, (-1)^2=1
add that to both sides
c^2-2c+1=1/4+1
factor perfect squaer and add
(c-1)^2=5/4
square root both sides
c-1=+/-(√5)/2
add 1
c=1+/-(√5)/2

c=2.12 or -0.12

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3 years ago

A reasonable estimate of the

lyudmila [28]

Answer:

Step-by-step explanation:

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3 years ago

Can someone help me out?

Lapatulllka [165]

502.7 is the answer!

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3 years ago

the end of the road is 15/16 of a mile away. Luke walked 7/8 of a mile down the road. How much further did he need to walk

AURORKA [14]

Answer:

1/16 of a mile left to walk to reach the end of the road

Step-by-step explanation:

The total distance to be walked = 15/16 miles

already walked= 7/8 miles = 14/16 miles

15/16 - 14/16 = 1/16 miles

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2 years ago

Let f(x) = x2 - 81. Find f-1(x).

dusya [7]

This is equivalent to finding a function g in which $g(x^2-81)=x$ .

We simply reverse the actions of the initial function by adding 81 back and taking the square root. Therefore, $f^{-1}(x)=\sqrt{x+81}$ .

7 0

3 years ago