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A spaceship at rest relative to a nearby star in interplanetary space has a total mass of 3.00 10 kg. Its engines fire at t= 0, steadily burning fuel at 79.7 kg/s with an exhaust speed of 4.50 10 m/s. Calculate the spaceship's acceleration at t= 0, mass at t-115 s, acceleration at t-115 s, and speed at t= 115s, relative to the same nearby star | HINT (a) acceleration at t=0 (Enter the magnitude. Enter your answer in m/s²) 11.95 ✔ m/s² (b) mass at t- 115s (Enter your answer in kg.) 20835 ✔kg (c) acceleration at t-115 s (Enter the magnitude. Enter your answer in m/s².) 3.44 x m/s² (d) speed at t-115s (Enter your answer in m/s.) m/s Need Help? Plead VAR