10 points 4.During a recent bike ride, the chain on Elena's bicycle slipped off the rear gear. In order to re-attach the chain, she turned her bicycle upside- down and placed the loose chain on top of the rear gear. She used the pedal to slowly rotate the tire 3/8 of one complete rotation to reattach the chain, as shown by the arrow in the following figure. What is the measure of the central angle? * O 45 degrees 67.5 degrees O 120 degrees O 135 degrees

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.