Mr. Connelly, the school teacher-librarian, wants to purchase new books for the school
library. He has the following ideas for
collecting data:
A. Observe which books are most
commonly taken out, and buy more
books by the same authors.
B. Ask all the students who come into the
library what new books they would like
to have in the library.

C. Visit a Web site that lists the award-
winning books for the past three years.

D. Create a questionnaire to give to all the
students in the school, asking about
their favourite kinds of books.
a) Which ideas involve collecting primary
data?
b) Which ideas include a bias in favour
of students’ opinions?
c) Which idea includes a bias against
students’ opinions?

answer: $34.31

step-by-step explanation:

$11.99 x 3 = $35.97

$35.97 - 10% = $32.37

$32.37 + 6% = $34.31

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.