Answer:




Step-by-step explanation:
The equation needs to be rearranged in terms of one trigonometric function:





The tangent function has positive values in the 1st and 3rd Quadrants. Then, the solutions are:




15*6=90 hours
90 *8.25=742.50
Your answer would be $742.50. Hope it helps!
I think the answer is 816cm
Well, to write the definition of "Perpendicular lines form right angel" using "if and only if". the sentence would become :
<em>
</em><em>Two lines are perpendicular if and only if they form a right angle
</em><em>
</em><em />Hope this helps