Two trains A and B moving on a horizontal trackwith velocities Va=(40+¡30)km/h and Vb=(25-¡50)km/h. Determine in polar form the velocity of A relative to B.

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

Is the square root of 4 plus the square root of 16 rational?