Will Give Brainliest! Which of the following formulas could be used to determine the surface area of a cylinder sandwiched between one cone and half of a sphere?

SA = 4 r 2
SA = 2l + l 2
SA = 2 rh + 2 r 2
SA = r + r 2
SA = 2lw + 2lh + 2wh
SA = 2B + Ph

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Which number line correctly shows 0.8 + 0.3?

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?