Which of these would be a good reason to use scientific model? (a) to use up extra research money (b) to replace a prototype with something better (c) to make a scientific idea more understandable (d) to keep scientists from getting bored when they work

c

step-by-step explanation:

at least i think its

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,