the deepest point of lake titicaca in the south america is -922 feet relative to its surface. the deepest point is 11,542 feet above sea level. what is the elevation of the surface of the lake? use absolute value to explain.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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.

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!