Given:
n = 27, sample size
df = n-1 = 26, degrees of freedom
xb = 11.8, sample mean
s = 2.3, sample standard deviation.
Because population statistics are not known, we should use the Student's t-distribution.
At 99% confidence interval, the t-value = 2.779 (from tables).
The confidence interval is
11.8 +/- 2.779*(2.3/√(27)) = 11.8 +/- 1.23 = (10.57, 13.03)
Answer: (10.6, 13.0) to the nearest tenth
On the unit circle, the abscise (x) is the cosine and the ordinate (y) = sinus
So y is the sinus
Answer:
35
Step-by-step explanation:
plug in 13 for b, 2(13)+9 then multiply and add
Answer:
a. shown below
b. 9x+14
Step-by-step explanation:
a. (on the bottom)
b. (3x+7)(3x+2)
multiply the terms:
9x+14
thats the area
Answer:
Step-by-step explanation:
If C=2πr
r=C/2π (change of sbject)
