Which number is the largest? -0.65,-0.622,-5/8​

For each proportion find the unknown number x 1/5/8=×/15

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?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square