Answer:
Stress = F / A force per unit area
A = 3.00 cm^2 = 3 E-4 m^2
F = 2.4E8 N/m^2 * 3E-4 m^2 = 7.2E4 N max force applied
F/3 = 2.4E4 N if force not to exceed limit (= f)
f = M a
a = 2.4 E4 N / 1.2 E3 kg = 20 m / s^2 about 2 g
Answer: 

Explanation:
Firstly, let's convert these length to meters
, in order to work with the same units:
a. 400 millimeters

b. 22 kilometers

c. 170 meters
Here the lenght is already in meters
d. 3.3 centimeters

Now that we have all the lengths in meters, we can order them from shortest to longest:

or

Before solving you must convert miles per hour to meters per second
146.95 J