Apositive multiple of 45 less than 1000 is randomly selected. what is the probability that it is a two-digit integer? express your answer as a common fraction.

Consider circle c with angle acb measuring 3/4 radians. if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis

If wxyz is a square, which statements must be true?