Valentina, the band director for the Salem High School marching band, is buying instruments to expand the brass section. A tuba costs $1,900 and a trumpet costs $330. The total
expenditure must be below $7,500.
Select the inequality in standard form that describes this situation. Use the given numbers
and the following variables.
x = the number of tubas purchased
y = the number of trumpets purchased

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?