A paint manufacturer wished to compare the drying times of two different types of paint. independent simple random samples of 11 cans of type a and 9 cans of type b were selected and applied to similar surfaces. the drying times, in hours, were recorded. the summary statistics are as follows. determine a 98% confidence interval for the difference, between the mean drying time for type a and the mean drying time for type

b. 4.25 to 15.35 hours 4.48 to 15.12 hours 4.18 to 15.42 hours 4.32 to 15.28 hours

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x