Apopulation is normal with a variance of 13. suppose you wish to estimate the population mean. find the sample size needed to assure with 68.26 percent confidence that the sample mean will not differ from the population mean by more than 2 units

The margin of error is given by the formula

Solving for n,

Here

Using standard normal table

Substituting numerical values,

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.