About travels 280 miles downstream and back. the trip downstream took seven hours. the trip back took 14 hours. the speed of the boat in still water and the speed of the current

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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,

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .