Consider the density curve plotted below:

Find PX < 6.4):
Find P(X> 4.8):

Step-by-step explanation:

Part a

We want to find:

And we just need to find the area below the curve until x=6.4, since we have a triangle we can do this:

Part b

For this case we want to find this probability:

And we can use the complement rule and we got:

step-by-step explanation:

no of data

divide by no of mode

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,