A student has $248 in a bank account that earns no interest. The
student deposits an additional $20 each week with no withdrawals.
The function f (x) = 20x + 248 represents the amount of money in
the account, where is in weeks.
How much money, in dollars, will be in the account after 1 year (52
weeks), representing f (52)?
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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?