Two automobiles leave a city at the same time and travel along straight highways that differ in direction by 84 degrees. If their speeds are 60 mi/hr and 45 mi/hr respectively, approximately how far apart are the cars at the end of 20 minutes?

Two cities 270 km apart lie on the same meridian. Find their difference in latitude if the earth's radius is 3,960 km.

To find the distance between two points A and B, a surveyor chooses a point C that is 420 yards from A

Convert 480 cm into meters.

From the equation 7x²+ (2k-1)x - 3k + 2 = 0, determine the value of k so that the sum and product of the roots are equal.

A and B can do the a piece of work in 42 days, B and C in 31 days and C and A in 20 days. In how many days can all of them work together?

The equation whose roots are the reciprocals of the roots of the equation 2x² -3x-5=0.

Find B: