Which statements are true? Select all that apply

a. The length of side ED is equal to the length of side DC.

b. The length of side EA is equal to the length of side AB.

c. You can find the length of side BC by counting.

d. Shape ABCDE is a pentagon.

e. Shape ABCDE is a hexagon.

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

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?