Astudent is given areading list of
10 books from which he must
select 2 for an outside reading
requirement. in how many ways
can he make his selection

answer:

a lot

step-by-step explanation:

i just know

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,