7.20 Let x denote the lifetime (in thousands of hours) of a certain type of fan used in diesel engines. The density
curve of x is as pictured:
0
25
50
Shade the area under the curve corresponding to each
of the following probabilities (draw a new curve for
each part):
a. P(10 b. P(10 Sxs 25)
c. P(x < 30)
d. The probability that the lifetime is at least 25.000 hr
e. The probability that the lifetime exceeds 25.000 hr

a) what number, when added to negative four, is equal to negative five?

step-by-step explanation:

depends on how many days you are talking about

step-by-step explanation:

the diver is 33 feet below the surface.

step-by-step explanation:

hope this

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.