When are the absoulte value and the oppposites of a rational number equal

The opposite of a number is sometimes equal to the opposite of the absolute value of the number. When the number is positive or 0, the statement is true.

Step-by-step explanation:

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,