Answer:
the answer is C
give the comments brainlest
Step-by-step explanation:
Answer:
0.007%
Step-by-step explanation:
4000/28=0.007%
Answer:
V = 8 cm³
Step-by-step explanation:
This is basically the formula for volume of pyramid:
Volume of Pyramid = 1/3 × Base Area x Height
OR
Volume of Pyramid = (Base Area x Height)/3
V = Bh/3
Given:
B = 4 cm²
h = 6 cm
V = Bh/3
= (4 x 6) / 3
= 24 / 3
V = 8
Hence
V = 8 cm³
If you want to represent this into inches simply divide 8 with 2.54 as
1 cm = 2.54 inches So,
8 cm / 2.54 cm = 3.15 in
Answer:
95% confidence interval for the mean number of months is between a lower limit of 6.67 months and an upper limit of 25.73 months.
Step-by-step explanation:
Confidence interval is given as mean +/- margin of error (E)
Data: 5, 15, 12, 22, 27
mean = (5+15+12+22+27)/5 = 81/5 = 16.2 months
sd = sqrt[((5-16.2)^2 + (15-16.2)^2 + (12-16.2)^2 + (22-16.2)^2 + (27-16.2)^2) ÷ 5] = sqrt(58.96) = 7.68 months
n = 5
degree of freedom = n-1 = 5-1 = 4
confidence level (C) = 95% = 0.95
significance level = 1 - C = 1 - 0.95 = 0.05 = 5%
critical value (t) corresponding to 4 degrees of freedom and 5% significance level is 2.776
E = t×sd/√n = 2.776×7.68/√5 = 9.53 months
Lower limit of mean = mean - E = 16.2 - 9.53 = 6.67 months
Upper limit of mean = mean + E = 16.2 + 9.53 = 25.73 months
95% confidence interval is (6.67, 25.73)
