Answer the following questions using the table given. Frequency
Relative Frequency
Wendy's Dinner
Service times (sec)
Cumulative
Frequency
4
30-69
70-109
11
15
110-149
150-189
10
4
190-229
230-269
6
a. Find the class width
b. Find the 6 class midpoints.
c. Find the class boundaries.

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?