Two chemical companies can supply a raw material. the concentration of a particular element in this material is important. the mean concentration for both suppliers is the same, but we suspect that the variability in concentration differ between the two companies. the standard deviation of concentration in a random sample of n1 = 10 batches produced by company 1 is s1 = 4.8 grams per liter, while for company 2, a random sample of n2 = 16 batches yields s2 = 5.9 grams per liter. is there sufficient evidence to conclude that the two population variances differ?

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

He graph of f(x) = |x| is stretched by a factor of 0.3 and translated down 4 units. which statement about the domain and range of each function is correct? the range of the transformed function and the parent function are both all real numbers greater than or equal to 4. the domain of the transformed function is all real numbers and is, therefore, different from that of the parent function. the range of the transformed function is all real numbers greater than or equal to 0 and is, therefore, different from that of the parent function. the domain of the transformed function and the parent function are both all real numbers.