(A)
P(<em>X</em> < 61.25) = P((<em>X</em> - 55.4)/4.1 < (61.25 - 55.4)/4.1)
… ≈ P(<em>Z</em> ≤ 0.1427)
… ≈ 0.5567
(B)
P(<em>X</em> > 46.5) = P((<em>X</em> - 55.4)/4.1 > (46.5 - 55.4)/4.1)
… ≈ P(<em>Z</em> > -2.1707)
… ≈ 1 - P(<em>Z</em> ≤ -2.1707)
… ≈ 0.9850
Step-by-step explanation:
Hope it helps.
Handwriting is a bit poor. So, restraint is advised!
:)
I have no clue I don’t understand this
The answer would be 15 +20x. You have to combine like terms.
2+6+7+20x
8+7+20x
= 15+ 20x (answer)
Hello, Marymack!
We know that in a geometric sequence defined by

and

, the sum can be calculated the following way: