By using the concepts of <em>unit</em> circle and <em>trigonometric</em> functions, we find that the angle OA, whose x-coordinate is 0.222, has a measure of approximately 77.173°.
<h3>How to find an angle in an unit circle</h3>
<em>Unit</em> circles are circles with radius of 1 and centered at the origin of a Cartesian plane, which are used to determine angles and <em>trigonometric</em> functions related to them. If we use <em>rectangular</em> coordinate system and the definition of the <em>tangent</em> function, we find that the angle OA is equal to:


tan θ ≈ 77.173°
By using the concepts of <em>unit</em> circle and <em>trigonometric</em> functions, we find that the angle OA, whose x-coordinate is 0.222, has a measure of approximately 77.173°.
To learn more on unit circles: brainly.com/question/12100731
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Number of hours Xavier worked on Monday = 10 hours
Number of hours Xavier worked on Tuesday = 15 hours
Total pay received by Xavier = $280
Total number of hours worked by Xavier = (10 + 15) hours
= 25 hours
Rate per hour = 280/25 dollars per hour
= 11.2 dollars per hour
The bisector should be (5,4)
96-(8×4)=44(total of chocolate cupcake)
44÷4=11 (number of chocolate cupcake each box)