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Arada [10]
2 years ago
5

A tunnel is constructed with a semielliptical arch. The width of the tunnel is 80 feet, and the maximum height at the center of

the tunnel is 30 feet. What is the height of the tunnel 4 feet from the edge? Round your answer to the hundredths place.
4.01 feet
9.37 feet
13.08 feet
29.85 feet
Mathematics
2 answers:
slavikrds [6]2 years ago
7 0

Answer:

Step-by-step explanation:

Example Equation of an ellipse with horizontal major axis with center at (0,0):

x%5E2%2Fa%5E2%2By%5E2%2Fb%5E2=1

For given problem:

b=20

b^2=400

a=30

 

a^2=900

equation: x%5E2%2F900%2By%5E2%2F400=1

y%5E2%2F400=1-x%5E2%2F900

Vlada [557]2 years ago
7 0

Answer:

4.01 _feet

=29.850

Step-by-step explanation:

Espero averte ayudado :-)

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nirvana33 [79]

Answer:

3

Step-by-step explanation:

4(1/2+3/4)+(-2)   Distribute.

2+3+(-2)             Simplify.

2+3-2

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Hope this helps!! Have an amazing day (。・∀・)ノ゙

5 0
2 years ago
Is x = -12 a solution of x^2 +10x+25=49?
Tresset [83]

Answer:

Yes

Step-by-step explanation:

{x}^{2}  + 10x + 25 = 49 \\  {x}^{2}  + 10x + 25 - 49 = 0 \\  {x}^{2}  + 10x - 24 = 0 \\ (x + 12)(x -2 ) = 0 \\  \\ x  + 12 = 0 \\ x =  - 12 \\  \\  \\ x  - 2 = 0 \\x = 2

I hope I helped you^_^

8 0
2 years ago
The expression 5,430,900 is written in standard notation.
MA_775_DIABLO [31]
Its false, standard notation would have an exponent. 

4 0
3 years ago
Read 2 more answers
ebony wants to buy a dvd player and dvds the equation relates the total cost for dvds and dvd player and N dvds is p=20n+200 wha
kupik [55]

____________________________________________________

Answer:

It represents the cost of the DVD player.

____________________________________________________

Step-by-step explanation:

The reason why it represents the cost of the DVD player is because in the question, it doesn't mention anything about buying multiple DVD players. Ebony would need to buy many DVD's, but doesn't need many DVD players because ebony could use one for all of the DVD's. If you noticed in the question, it says "a DVD player," what  this means is that Ebony is only going to buy one DVD player, since it's singular (without and s at the end).

The equation is saying that she starts off with buying 1 DVD player for 200 dollars; and, she is buying n (number of DVDs) for 20 dollars each.

This shows that the 200 in the equation in the question represents the cost of the DVD player.

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3 0
3 years ago
What is the equation of the line?
BartSMP [9]
B. it’s the change in y over the change in x
7 0
2 years ago
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