PLEASE HELP If the tetrahedrons on your solid have edges that are 4 inches long, what is the area of one of
its triangular faces? Round your answer to the nearest hundredth. Show your work. (4 points: 3
points for the area, 1 point for work shown)

My solid is an octahedron with tetrahedrons

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?