We have to find the measure of Angle BCA if line AD is a tangent to circle B. Then we have to choose the correct answer. Tangent line is a line that touches a circle at exactly 1 point. The tangent line ( here AD ) at point C is perpendicular to the radius ( here BC ) to that point. Therefore measure of Angle BCA is 90°. C. 90°.
Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.