Arowboat is crossing a river that is 500 m wide and traveling due east at a speed of 2.2 m/s. the river’s current is
0.8 m/s due south.
a. what is the resultant velocity of the boat?
b. how long does it take for the boat to cross the river?
c. how far downstream is the boat when it reaches the other side?

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

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?