The equation y = 3.25x + 0.50 models the situation, where x is the number of pounds of granola purchased, and y is the total cost. Which statement about the equation is true? Granola costs $3.25 per pound.
Granola comes in boxes that hold 0.5 pound.
The total cost of granola is $3.75.
There are 3.25 pounds of granola in 0.5 pound box.

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?