Hope this helps with the answer
Answer:
Use the arrow with the filled in circle pointing to the left. Put the filled in circle part on 46.
Step-by-step explanation:
The question is asking you to plot on the number line, the inequality h is less than or equal to 46. Since the inequality uses or equal to, The little dot has to be filled in to symbolize that. Since it also says less than, the arrow has to be pointing to the left. Finally, we have to put the dot on 46, to show what h is less than or equal to.
Answer:
52 degrees
Step-by-step explanation:
a line is 180 degrees so just subtract 128 from 180 which is 52
Answer:
0.2172<x<0.2668
Step-by-step explanation:
The formula for calculating the confidence interval is expressed as;
CI = xbar ± (z*s/√n)
xbar is the average = 0.242ppm
z is the z score at 95% confidence = 1.96.
s is the standard deviation = 0.04pm
n is the sample size = 10
substitute the values into the formula;
CI = xbar ± (z*s/√n)
CI = 0.242 ± (1.96*0.04/√10)
CI = 0.242 ± (1.96*(0.04/3.1623))
CI = 0.242 ± (1.96*(0.01265))
CI = 0.242 ± (0.02479)
CI = (0.242-0.02479, 0.242+0.02479)
CI = (0.2172, 0.2668)
Hence a 95% confidence interval for the mean mercury content of coal from this source is 0.2172<x<0.2668.