Answer:
3 feet
Step-by-step explanation:
P=2(a+b)
14=2(4+b)
14=8+2b
2b=6
b=3
z=-3
Step-by-step explanation:
14 and 35 both divisible by 7
,14 and 91 both divisible by 7
14 and 38 both divisible by 3
answer is 14 and 81
Answer: n = 14
Step-by-step explanation: margin of error = critical value × σ/√n
Where σ = population standard deviation = 1
n = sample size = ?
We are to construct a 99% confidence interval, hence the level of significance is 1%.
The critical value for 2 tailed test at 1% level of significance is gotten from a standard normal distribution table which is 2.58
Margin of error = 0.7
0.7 = 2.58×1/√n
0.7 = 2.58/√n
By cross multipying
0.7×√n = 2.58
By squaring both sides
0.7^2 × n = 2.58^2
0.49 × n = 6.6564
n = 6.6564/0.49
n = 14