Answer: 720 ways
Step-by-step explanation:
Given
A train has 1 main engine and remaining 6 train cars
If the engine is always in the front the remaining train cars can be arranged is

Answer:
C, B
Step-by-step explanation:
x y
A 34 408
B 40 480
C 46 588
A= $12/hour
B= $12/hour
C= $12.78/hour
The difference between A and B is 72. The difference between B and C is 108.
Answer:
45.8
Step-by-step explanation:
We need to find the surface area for this entire figure!
We can see that this is a pyramid here - we must find the area of the 3 triangles and the base triangle at the bottom.
The 3 triangles building up the pyramid are all equal to each other.
To find the area of a triangle, use 

Round to the nearest tenth: 45.75 -> 45.8
Answer:
392
Step-by-step explanation: