Answer:
B
Explanation:
Let's say Da is the distance Al drives and Db is the distance Ben drives. And let's say that t is the amount of time that Al drives.
Using the distance equation, we can say:
Da = 40t
Db = 20(t + 3)
We know that Da + Db = 240, so:
240 = 40t + 20(t + 3)
240 = 40t + 20t + 60
180 = 60t
t = 3
So Al had been driving for 3 hours when the dispatcher retrieved the data. Al started driving at 11 AM, so the dispatcher must have retrieved the data at 2 PM.
Answer:
A force is a push or pull upon an object resulting from the object's interaction with another object.
Explanation:
Density=mass/volume. if you know any 2 of these variables, you can figure out the missing one
Work done by gravity = 23,520 J = mgh. Therefore m= 23520/ 30 x 9.8 = 80 kg.
Answer:
effort arm mean the use of any work by using your hand force motion or by hand power