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LenKa [72]
2 years ago
13

A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B an

d C, as shown below:
A source of laser light is at point A on the ground between two parallel walls. The walls are perpendicular to the ground. AB is a ray of light which strikes the wall on the left at point B. The length of AB is 40m. AC is a ray of light which strikes the wall on the right at point C which is 80 m above the ground. The ray AB makes an angle of 60 degrees with the ground. The ray AC makes an angle of 45 degrees with the ground.

What is the distance between the walls?
Mathematics
1 answer:
snow_tiger [21]2 years ago
3 0

The distance between the walls is: 76.56854249

Cos(60)=A/40

Cos(45)=A/80

20+56.56854249

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3 0
3 years ago
What is the area of the figure?<br><br> 96 ft 2<br> 84 ft 2<br> 40 ft 2<br> can't be determined
Georgia [21]

Answer:

What ever the length and width is you times them both I don't know if you exactly know that are now  but I think it is C

Hope it helps have a great day:)

6 0
1 year ago
Use the unit circle to evaluate the followingHow do I solve this problem?
Ilya [14]

Notice that:

\cos (\frac{4\pi}{3})=\cos (\pi+\frac{\pi}{3})\text{.}

Recall that:

\cos (\pi+x)=-\cos (x)\text{.}

Therefore:

\cos (\frac{4\pi}{3})=-\cos (\frac{\pi}{3})=-\frac{1}{2}\text{.}

Answer:

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6 0
11 months ago
Find either the maximum or the minimum value of the following quadratic equation. Be sure to show all of your work and identify
podryga [215]

Answer:

the minimum is (1,-9)

Step-by-step explanation:

y = 5x^2 - 10x - 4

since the parabola opens upward  5>0, this will have a minimum

it will occur along the axis of symmetry h=-b/2a

y =ax^2 +bx+c

h = -(-10)/2*5

h  = 10/10 =1

the minimum occurs at x =1

the y value for the minimum is calculated by substituting x =1 back into the equation

y = 5 * 1^2 - 10*1 -4

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6 0
3 years ago
The question is asked of the photo
aivan3 [116]
Pythagoras Theorem:
 \boxed { \boxed {a^2 + b^2 = c^2 \beta }}

Apply Pythagoras Theorem:

a² + 6² = 11²

a² = 11² - 6²

a²= 85

a = √85

a = 9.22 (nearest hundredth)

Answer: RT = 9.22 cm
3 0
3 years ago
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