This is a geometric sequence with first term 1 and common ratio -1/2. r=-1/2.
a(n) = a(1)*(r)^(n-1).
Check: If n=2 our formula must return -1/2. Does it?
a(2) = 1(-1/2)^(2-1) = (-1/2)^1 = - 1/2. Yes.
a(3) should be 1/4. Is it? a(3) = (-1/2)^(3-1) = 1/4 Yes.
Then a(8) = (-1/2)^(8-1) = (-1/2)^7 = -1 / 2^7 = -1/128 (answer)
Answer:
A. increase the sample size
Step-by-step explanation:
By increasing sample size, the amount of data included in the statistical calculation is more. As the size increases, the uncertainty decreases, hence the confidence level on our estimate is higher. By having more sample, we have more accurate analysis, and our margin of error can be reduced as well.
Answer:
close. Quotient = x² -8x +27; Remainder -77
Step-by-step explanation:
It looks like you forgot an x in your restatement of the quotient. Otherwise the work appears correct.
You may need to write the quotient as ...
x² -8x +27 -77/(x+3)
It will depend on the form of answer your teacher is looking for.
Answer:
x=39 degrees
Step-by-step explanation:
28+33+x=100
61+x=100
