write a function rule that gives the total cost c(p) of p pounds of sugar if each pound costs $0.42.

a. c(p) = 42p

b. c(p) = 0.42p

c. c(p) = p + 0.42

d. c(p) =p/0.42

b. c(p) = 0.42p

Step-by-step explanation:

you are multiplying the cost (0.42) by the pounds (p)

and

Step-by-step explanation:

Let us assume that the coordinates of a and c are respectively and  , and the coordinates of point b are  .

So, we have to express the coordinates of b in terms of the coordinates of a and c provided the ratio of segment ab to bc is 3 : 1.

Now, we know, the formula of coordinate geometry that if there are two known points P   and Q   and the point R divides PQ line segment in m : n ratio internally, then the coordinates of R will be given by .

Therefore, using this formula we can write  

and  

(Answer)