A salesperson's monthly expenses (in thousands of dollars) are exponentially distributed, with an average of 2.75 (thousand dollars). a. give the probability density function for the expenses. b. find the probability that the expenses are more than $4,000.

Step-by-step explanation:

Given that a salesperson's monthly expenses (in thousands of dollars) are exponentially distributed, with an average of 2.75 (thousand dollars).

Hence pdf of X is

a)

b)  

Almost negligible.

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?

3/5

step-by-step explanation:

double number line is not a standard concept, so it must have been defined in your textbook. assume top line is numerator.