Math Answers

a group of student got the following scores in an achievement test 9,12,15,18,21 and 24. consider samples of size 3 that can be drawn from this population.

The production manager of a large manufacturing company estimates that the mean age of his employees is 22.8 years. The treasurer of the firm needs a more accurate employee mean age figure in order to estimate the cost of an annuity benefit program being considered for employees. The treasurer takes a random sample of 70 workers and finds out that the mean age of the employees sampled is 26.2 years with a standard deviation of 4.6 years. At the 0.01 level of significance, what can the treasurer conclude about the accuracy of the production manager’s estimate?

What is the cardinality of this set?

A={{ },{a,b}}

What is the cardinality of this set?

A={{ },{a,b}}

A town has a population of 14000 and grows at 3% every year. What will be the population after 6 years, to the nearest whole number?

A town has a population of 14000 and grows at 3% every year. What will be the population after 6 years, to the nearest whole number?

Suppose the domain of the propositional function P(x) consists of the integers −2,

−1, 0, 1, 2. Write out each of these propositions using disjunctions, conjunctions, and

negations.

a) ∃xP(x)

b) ∀xP(x)

c) ∃x¬P(x)

d) ∀x((x ≠ 1) → ¬P(x))

Apopulation consist of 1,3,5,7,9 with sample size 2

Using L'Hospital's Rule to determine limits to infinity

Differentiation. Find the derivative of the given function. Use quotient rule.

f(x)= (x^-1)/(x+x^-1)