Answer:
x = 5
Step-by-step explanation:
Given that,

Cross multiplying both sides,

Taking like terms together,

So, the value of x is equal to 5.
It's true because a pint is used to locate co-ordinates and has no size or dimension
0.63 is the correct answer
The 99.87th percentile, or the area to the left of the 3 standard deviation mark it 99.87% better than everyone/everything else.