I got 70
Combination=n!/((n-r)!r!)
=8!/((8-4)!*4!)
=8*7*6*5*4!/(4!*4!)
=8*7*6*5/(4*3*2)
=70 ways
The area of a rectangle is given by (l = length, w = width):
So, in this case, we just have to plug in the numbers.
So, the area of the rectangle is
1.68 m².
Answer D <<<<
You are correct
It could be any time, but I would say 10. 10*10=100
hope it helps!