What is a apostaphe?

When the dots on a scatter diagram seem to form a straight line that goes upward to the right the dots indicate? What is described by the equation H2Os heatH2Ol? What do you use to represent a variable in algebra? What s the amplitude and period of y cos 8x? How many hours makes 613 minutes? 500 ft is how much in miles? How do you find a percentage of change? What was the currency used by the Mughal Empire? The next number after a square number is always prime is that true? What is 96 - 28? How many different ways can thirty squares be arranged into two congruent staircases? How do you convert 900000 km in feet? What is 50 percent of 821? What is yards into feet? What is 9 900 000 000? 9 into 99? What divided by 7 equals 68? How do you round 0.62? How many syllables in attentive? If 15 out of 25 is correct what percent is that?