Teresa worked 18 hours at a day-care center as a volunteer. This represents 60% of her school's requirements for community service. How many hours of community service does her school require?

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

step-by-step explanation: