The surface area of a cone HELP with radius r units and slant height s units is shown below: Surface area = 3.14(rs +12)
Part A: If r = 2 units and s = 3 units, write an expression that can be used to calculate the surface area of the cone.
Part B: What is the surface area of the cone? Show your work. (6 points)

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

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?