Answer:
tn = 7 + (n - 1)*(-2) or
tn = 9 - 2n
Step-by-step explanation:
You are (beginning with 7) subtracting 2 from the term to the left.
a = 7
d = -2
tn = a1 + (n - 1)*d
tn = 7 + (n - 1)*(-2)
Try this out on n = 4
t4 = 7 + (4 - 1)*-2
t4 = 7 + (3) (-2)
t4 = 7 - 6
t4 = 1 just as it says.
More generally
tn = 7 + (n - 1)*-2
tn = 7 + (-2n) + 2
tn = 9 - 2n
Answer:E 40
Step-by-step explanation:
The 99.87th percentile, or the area to the left of the 3 standard deviation mark it 99.87% better than everyone/everything else.
<h3>
Answer: 1</h3>
Work Shown:
P(A or B) = P(A) + P(B) - P(A and B)
P(A or B) = 0.8 + 0.55 - 0.35
P(A or B) = 1.35 - 0.35
P(A or B) = 1
A probability of 1 means there is 100% certainty the event happens. This must mean that there are only possible outcomes are: either event A happens, or B happens, or possibly both A and B happen simultaneously.
Answer:
2.75 dollars
Step-by-step explanation:
If 7 boxes cost 19.25 dollars to get one box you would divide 19.25 by 7