Suppose these statements are true:
if you don't tie your shoes, you will trip over your shoelaces.
if you trip over your shoelaces, you will fall down.
if you fall down, you will skin your knees.

fill in the blanks to create three more statements that follow logically from these. they must be different from the ones above.

if you don't tie your shoes,
if you don't tie your shoes,
if you trip over your shoelaces,

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?