Suds-a-Lot conducted a study that showed 97% customer satisfaction, with a standard deviation of 1%. The sample included 25 people who appeared in
one of their commercials, during the past 5 years.
Feel Fresh conducted a study that showed 90% customer satisfaction, with a
standard deviation of 4%. The random sample consisted of 100 people, who
had recently purchased one of their products.
Which of the company claims is more believable and why?
A. Feel Fresh because the standard deviation is larger.
B. Feel Fresh because the sample was not biased.
C. Suds-a-Lot because the standard deviation is smaller.
D. Suds-a-Lot because the time span was longer.

step-by-step explanation:

i can you with this sweetie!

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!