Circle the problem that uses competition.

7. 32.7+15.6=32.6+15.7 45.7+26.2=45.7+26.3-0.1

8. 14.24-11.8=14.24-12+0.2 168.3-53.8=168.3-53.4-0.4

What does the relationship between the mean and median reveal about the shape of the data

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?

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.