Answer:
Lower limit = 0.76
Upper limit = 0.84
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 350
Number of drivers that buckle = 280
Formula:


The standard deviation for sp =

95% Confidence Interval:


Putting the values, we get,

Lower limit = 0.76
Upper limit = 0.84
5/12 k=15/16
k=(15*12) / (16 * 5)
K=180/80=9/4
Answer: K=9/4
Answer:D
Step-by-step explanation:
The integers or -3, -2, -1,0, and 1
2x(x+4)-1(x+4)
2x^2+8x-x-4
2x^2+7x-4