55:04 To bill customers for water usage, one city converts the number of gallons used into units. This relationship is
represented by the equation u = 748g, where g is the total number of gallons of water used and u is the number of
units.
Determine which statements about the relationship are true. Choose two options.
Og is the dependent variable.
Ou is the dependent variable.
Og is the independent variable.
u is the independent variable.
The two variables cannot be labeled as independent or dependent without a table of values.

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?