Americans spend over $30 billion annually on a variety of weight loss products and services. in a study of retention rates of those using the rewards program at jenny craig in 2005, it was found that about 18% of those who began the program dropped out in the first four weeks.10 assume we have a random sample of 300 people beginning the program.
(a)what is the mean number of people who would drop out of the rewards program within four weeks in a sample of this size? what is the standard deviation?
(b)what is the approximate probability that at least 235 people in the sample will still be in the rewards program after the first four weeks?

mxb67

step-by-step explanation:

answer: 2 answers

step-by-step explanation: the first one means to spread the product throughout the marketplace such that a large number of people can buy it.  

the second means the process of making a product or service available for the consumer or business user that needs it.

mark this brainliest and i will be glad to .

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752