The joint probability density function of x and y is given by f(x, y) = c(y 2 − x 2 )e −y , −y ≤ x ≤ y, 0 < y < [infinity] (a) find c. (b) find the marginal densities of x and y . (c) find e[x].

y-y1=4(x-x1)

step-by-step explanation:

this is point-slope form since you only have 4 as the slope it goes in place of m

hope this : )

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)