3 years ago

M5+m2+m3=180 whays the rwason

Mathematics

1 answer:

Marta_Voda [28]3 years ago

6 0

Answer: 45

Step-by-step explanation: the fub

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The cross section of a parabolic reflector has a vertical axis of symmetry with its vertex at (0,0) . The focus of the reflector

Paha777 [63]

Answer:

The depth of the reflector is 0.84 feet

Step-by-step explanation:

<em>(See the figure below)</em>

The equation of a parabola centered at the origin with an axis of symmetry on y-axis is:

$x^{2}=4py$ (1)

With p the distance from the origin to the focus using p=6, the equation (1) of the parabola becomes:

$x^{2}=4(6)y=24y$ (2)

Note that the point B is on the parabola, so this point should satisfy the parabola equation (2) that allow us to use the value x=4.5 to find the y value associated to it, that it is the depth (h) of the reflector:

$(4.5)^{2}=24y$ , solving for y

$y=\frac{(4.5)^{2}}{24}\approx0.84\,ft$

4 0

4 years ago

PLEASE HELP:URGENT

trasher [3.6K]

The answer is C: 80 feet

5 0

3 years ago

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The lenght of a triangle is 5 centimters greater than its width . the perimeter is 58 centimeters what are demetions of the rect

steposvetlana [31]

Let the width be x.

Length = 5 + x

Perimeter = 58

2(l + w) = 58

2(5 + x + x) = 58

2(5 + 2x) = 58

10 + 4x = 58

4x = 48

x = 12

Hence, the length is 17 cm and the width is 12 cm.

3 0

3 years ago

In need of help with this question .

Andreyy89

I wish I could help you but get got it the answers are more correct and accurate

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4 years ago

annie adds 2 spoonfuls of sugar to her tea and sophie adds 3 spoonfuls to her tea. If one spoonful is 4 grams of sugar and a a c

Tresset [83]

240%

Step-by-step explanation:

if there is 240 grams then you just put a percent sing but are you asking What is the percentage of sugar in each cup? by spoons?

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3 years ago