B) 2 hours and 15 minutes
Jill spent 3 hours at the mall and it took Jack 45 minutes to get back home.
3.00 - 0.45 = 2.15
<em>Have a luvely day!</em>
I’m doing it for the points
Step-by-step explanation:
I'll just give you 2 examples if you need a better understanding tell me
1) 2 * 2/4
a. First make 2 --> 2/1 so it's a fraction
b. Multiply 2 by 2 giving you 4
c. Multiply 1 by 4 giving you 4
d. You'll get 4/4
e. Simplify to 1 by dividing by the numerator and denominator 4
Answer : 1
2) 3 * 4/6
a. First make 3 --> 3/1 so it's a fraction
b. Multiply 3 by 4 giving you 12
c. Multiple 1 by 6 giving you 6
d. You'll get 12/6
e. Simiply to 2 by dividing the numerator and denominator by 6
Answer : 2
Answer: 40
Step-by-step explanation:
Answer: The number of first-year residents she must survey to be 95% confident= 263
Step-by-step explanation:
When population standard deviation (
) is known and margin of error(E) is given, then the minimum sample size (n) is given by :-
, z* = Two-tailed critical value for the given confidence interval.
For 95% confidence level , z* = 1.96
As, = 8.265, E = 1
So, ![n= (\dfrac{1.96\times8.265}{1})^2 =(16.1994)^2\\\\= 262.42056036\approx263\ \ \ [\text{Rounded to the next integer}]](https://tex.z-dn.net/?f=n%3D%20%28%5Cdfrac%7B1.96%5Ctimes8.265%7D%7B1%7D%29%5E2%20%3D%2816.1994%29%5E2%5C%5C%5C%5C%3D%20262.42056036%5Capprox263%5C%20%5C%20%5C%20%5B%5Ctext%7BRounded%20to%20the%20next%20integer%7D%5D)
Hence, the number of first-year residents she must survey to be 95% confident= 263
