The table below shows the probability distribution of student ages in a high school with 1500 students. What is the expected value for the age of a
randomly chosen student?
14
15
16
17
18
Age
13
Probability 0.01
0.27 0.30 0.25 0.16 0.01

the answer is $42.96

step-by-step explanation:

-60.75

step-by-step explanation:

just add the numbers then put the negative sign on it

let's first notice, the center of the hyperbola is at the origin, since the focus points are equidistantly 3 units away from the origin, that also means that the distance "c" from the center to either focus is 3.

it should also be notable that, the traverse axis for this hyperbola is vertical, or namely over the y-axis and therefore, the positive fraction will be the one with y-variable.

the traverse "a" component or distance from the center to either vertex is not 2, is more than 2, so we can safely put it at √5 ≈ 2.24.

4y - 6 + y^2 - 9 = y^2 + 4y - 15

y^2 term

terms

- terms

total of 3 terms when simplified

step-by-step explanation: