Alicia's mp3 player contains 1260 songs. given that 35% of the songs are rock songs and 20% are rap songs, how many of the songs are other type of songs?

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

If i have 20$ and i gave 5$ away how much i got

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?