This is a plane with two axis as a frame of reference. The x-axis is a horizontal line and the y-axis is perpendicular to it(I. e.,the y-axis is vertical). The intersection of the two axis is called the origin

what are we supposed to answer?? is it coordinate plane?

Step-by-step explanation:

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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,