Jenny and Melissa are stuck simplifying radical expressions. Jenny has to simplify x2/3 over x1/6 Ñ. Melissa has to simplify 30 radical x^2•x5•x^7. Using full sentences, describe how to fully Melissa's expressions. Describe if Jenny and Melissa started with equivalent expressions or if they started with expressions that are not equal.

What is the least common factor of 6 and 8

We just started the introduction into circles and i have no idea how to do this.

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?