With a principal investment of $31,500, which account will have the greatest value after 4 years? simple interest: i = p • r • t interest compounded annually is a = p (1 + r)t interest compounded quarterly: a = p (1 + )4t a. 2.3% with interest compounded annually b. 2.1% with interest compounded quarterly c. 2.5% in a simple interest account d. 2.4% with interest compounded quarterly

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?

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 work in a hospital that has 9 floors. you need to see 3 patients on each floor. how many patients do you need to see in all?