Discrete mathematics: suppose that a = {1, 2, 3} and b = {1, 2}. let r be the relation from a to b containing (a, b) if a ? a, b ? b, and a > b. what is the matrix representing r?

An advertisement is on a flyer that has a thickness of 8.2 × 10-5 meters. each measurement below is the thickness of a stack of flyers. drag each measurement to the correct stack.

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?