The temperature of a freezer started at 18°C. After cooling for a few hours, the freezer had a temperature of -12°C. What is the difference between the new, colder temperature and the original temperature?
O-12-18
O-12-(-18)
O 18-12
O 18+(-12)
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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?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25