Answer:
interval=(15.085,14.9515)
Step-by-step explanation:
Table:
CI Z
85% 1.440
90% 1.645
95% 1.960
In order to find the interval/estimate of hours per week students study we consider the formula given below:
Interval=X±
where:
X is the mean hours
Z is the value from Z distribution table of Confidence Interval
n is the sample size of students
S is the standard deviation
X=15, Z=1.645, S=2.3hours, n=78
Interval=15±
Interval=15±0.0485
interval=(15.085,14.9515)
Answer:
-1.2
Step-by-step explanation:
You're looking for values to factor this equation into (x+p)(x+q)
such that pq=12 and p+q=b
Assuming we're looking for simple values, you can start by factorizing 12:
12 = 3*4 = 2*6 = 12*1 = -3*-4 = -2*-6 = -12*-1
For 3 and 4, b would be 7
2 and 6 => b=8
12 and 1 => b=13
and for the negatives
b can be -7, -8 or -13
So the total set is -13, -8, -7, 7, 8, 13
40
I assumed that you wanted to know how much little cubes are in the big cubes...so.....first you need to find out the volume of the small cube : 1/2 x 1/2 = 1/4....then divide it with 10, then results with 40! :D
Answer:
4 pieces of paper
Step-by-step explanation:
There are 12 inches in a foot, so the banner is 36 inches long.
Divide 36 by 9 to find the number to pieces needed.
36/9=4
