Jenny recently received $3000 that she would like to invest for schooling, which she plans to attend in five years. One choice is to invest it in an account that pays 7% simple interest. Her other choice is to invest in an account that pays 6% compounded yearly. Which investment is better for her and why? How would I do this while writing an explicit function?

For what value of x does 4x = (1/8) x + 5?

3.4a=57.8 what is the the value of a

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?