This is the well known Monty Hall problem.
You have more chances of winning by switching doors.Let A,B,C denote the events "The ferrari is behind A" and so on
Let HA,HB,HC denote the events "The host opens A" and so on
By Baye's formula,

whereas

!!
Answer:
first option
Step-by-step explanation:
Given
area = 15x - 9 ← factor out 3 from each term
= 3(5x - 3)
Thus the dimensions are 3 by (5x - 3)
A scaler quantity is measured solely on its magnititude (size) and it lacks a direction. A vector, however, is measured on both its magnitude and direction. Examples of scalers are time and temperature because they only consist of a magnitude, but have no direction associated with them. Examples of vectors are velocity, acceleration, and force, because they consist of both a magnitude and a direction.
Hope this helped :)
Answer:
3x(10x10x10): 3x(1000): 3000-7000: -4000. (8x(-5)): -40. (4x4) +(2x2): (16 +4): 20
U+(v-t)
that’s the answer!