Paul plans to put concrete on a rectangular portion of his driveway. the portion is 12 feet long and 6 inches high. the price of concrete is $98 per cubic yard. the total cost of the concrete paul needs is $108.89. which of the following is closest to the width of the portion of the driveway on which paul plans to put concrete?

[1 foot = 12inches; 1 yard = 3 feet]

3 feet

5 feet

8 feet

10 feet

1) a researcher is studying a population of bats in which 16% of the population has a certain trait. the researcher wants sampling distribution with a standard deviation that is less than 2%. which sample sizes could the researcher use? select all that apply : a)n=200 b) n=300 c) n=400 d) n=500 2) from a normal distribution population, a simple random sample of size 38 is taken. the mean of the sample is 82 and the standard deviation of the sample is 4. what is the 90% confidence interval for the population mean? round to the nearest tenth ( [1], 83.1)