Answer:
40% profit
140% markup
Step-by-step explanation:
I'm not sure if it's asking what is the markup, or how much you are making.
But profit
$20 out of 50 = 0.40
Markup
70/50 = 1.4 -> 140% markup
144 = 64 + 20x
144 - 64 = 20x
80 = 20x
<u>4 = x</u>
<u>According to intersecting chords theorem:</u>
<u>Find the value of YZ:</u>