Answer:
Step-by-step explanation:
a.
4 people can be selected in ways=12 P4=12×11×10×9=11880
b.
4 women can be selected in ways=7P4=7×6×5×4=840
c.

Answer:
4/3 (4•5)} = 203
Step-by-step explanation:
The radius is half the diameter. 19*2=38. The diameter is 38.
Step-by-step explanation:


= -1 × 729
= -729
I believe this is a rotation through an angle of +90°, anticlockwise, (counterclockwise), with the center of rotation origin(0,0)
To describe rotation we give the center of rotation and the rotation angle in degrees stating whether it is clockwise or counterclockwise.