Sophie Ruth is eating a 50-gram chocolate bar which contains 30 % cocoa. How many grams of cocoa are in the chocolate bar?

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?