What is the domain of the relation?
{x{ x=-4,0, 1, 2}
O {x{ x=-7, -6, 2, 11, 3).
O {yly=-4,0, 1, 2).
O {yl y =-7, -6, 2, 11, 3).

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

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?

What is the value of x? enter your answer in the box.