42 32 30 32 44 36 45 43 What is the median

Mathematics

2 answers:

spayn [35]3 years ago

8 0

Answer:

39 is the median.

Step-by-step explanation:

First place the numbers in numerical order. 30,32,32,36,42,43,44,45 is the order. Then find the middle number and since the count of numbers is even add the two middle numbers together and then divide it by two. 36+42=78 then divide by two which is 39.

Hope this helped and have a great day!

(Please vote brainliest)

hammer [34]3 years ago

6 0

Answer:

(36+42)/2 = 39

Hope this helped

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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:

(See the figure below)

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