Answer:
C) The sample does not accurately represent the population
Answer:
n is 192
Step-by-step explanation:
Given data
Cl = 95%
interval = 0.2
to find out
what value n
solution
we have interval = 0.2
so interval has width at most is 0.5 so
margin of error E = 0.2 /2 = 0.1
and we know Z value for 95% Cl is 1.96 from z table
so sample n = Z²/E² ( ( 1 - 0.5) 0.5 + ( 1 - 0.5) 0.5 )
n = 1.96²/0.1² ( ( 1 - 0.5) 0.5 + ( 1 - 0.5) 0.5 )
n = 192.08
so n is 192
Answer:
12.906%/year
Step-by-step explanation:
Given data
Principal= $1000
Final Amount= $1900
Time= 5 years
The compound interest formula is given as
A= P(1+ r/n)^nt
Solving for rate r as a decimal
r = n[(A/P)1/nt - 1]
r = 12 × [(1,900.00/1,000.00)1/(12)(5) - 1]
r = 0.12906
Then convert r to R as a percentage
R = r * 100
R = 0.12906 * 100
R = 12.906%/year
300 ÷ 1
600 ÷ 2
900 ÷ 3
1200 ÷ 4
1500 ÷ 5
Answer:
Completing the square is always confusing, but if you keep in mind it's just a way to write (A + B )^2 so that the problem is in some easier form it makes a bit better sense. A perfect square has some helpful properties.. anyway..
Step-by-step explanation:
Given: 
- 12x +23 = 0 ( not a perfect square , tough to work with )
take 1/2 of the second term coefficient 12/2 = 6 and square it
- 12x + (
+23 = 
-12x + 
+23 =
now there is a perfect square :)
(x - 6)^2 =36-23
(x - 6)^2 = 13
take the square root of both side now
x -6 = 
x = +6
sooo what is supposed to happen in these problems is that square root of 13 is supposed to work out to something that is easy to find the root of ... maybe in your answers you left out the square roots? so maybe A is right :/
