2(n^2-3)=122
n^2=64
n=+/- 8
When n>0 the value of n is 8
Answer:
Mean = 0.45
Standard deviation = 0.04035
Step-by-step explanation:
This is actually a very simple problem.
The question gives us the report that 45% of the teenagers in the age bracket own smartphones.
P = mean = 45%
Therefore the mean is 0.45.
I will go ahead to help you calculate the standard deviation.
√p(1-p)/n
n = 152
P = 0.45
√0.45(1-0.45)/152
= √0.45(0.55)/152
= √0.2475/152
= √ 0.001628
= 0.04035
9514 1404 393
Answer:
8
Step-by-step explanation:
The distance formula is used to find the distances to each of the points:
d = √((x2-x1)² +(y2-y1)²)
d = √((4-0)² +(2-0)²) +√((4-8)² +(2-(-1))²) +√((4-5)² +(2-4)²)
d = √20 +√25 +√5 = 2√5 +5 +√5
d = 5 +3√5
Comparing to the form ...
d = m +n√5
we see that m=5, n=3. The the sum m+n = 5+3 = 8.
Here’s the answer, hope it helps!