Disregarding the force of gravity, the maximum velocity, v, of a rocket is given by vrt In M
where t is the velocity of the exhaust and Mis
the ratio of the mass of the rocket with fuel to its
mass without fuel. A solid propellant rocket has
a maximum velocity is 9.4 kilometers per
second. It has an exhaust velocity of 2.1
kilometers per second. Find its mass ratie M.
(Round your answer to the nearest whole
number.)