Number of Siblings
0
1
2.
3
4
5
6
Probability
0.25
0.32
0.17
0
0.07
0.03
0.01
Siblings
0.4
0.3
Probability
0.2
0.1
0.0
0
1
2
4
5
3
5
X = Number of Siblings
Use the probability distribution and histogram to select the correct probability for each statement
The probability that a randomly selected student has fewer than 4 siblings is
The probability that a randomly selected student has at least 5 siblings is
The probability that a randomly selected student is not an only child is

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?