Mathematics, 18.10.2019 06:30, santos200154

# An archway will be constructed over a walkway. a piece of wood will need to be curved to match a parabola. explain to maurice how to find the equation of the parabola given the focal point and the directrix.

the directrix is at 9 and the focus is at (7, 6)

Answers: 1

Mathematics, 21.06.2019 20:00, Chen5968

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Answers: 2

Mathematics, 21.06.2019 22:00, Jasten

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Answers: 1

Mathematics, 22.06.2019 00:40, giulianna41

Agroup of patients with lung cancer is matched to a group of patients without lung cancer. their smoking habits over the course of their lives is compared. on this basis, researchers calculate the rate of lung cancer in patients who smoke versus those who never smoked. this is an study? a. cohort study case-control study c. randomized control study d. cross-sectional study e. longitudinal study

Answers: 2

An archway will be constructed over a walkway. a piece of wood will need to be curved to match a par...