Can you answer number 4 and can you answer question 3.

3)a convenience store sells two brands of orange juice. Brand A contains 11 fluid ounces and costs $2.31.Brand B contains 15 fluid ounces and costs $2.70.

What is the difference in cost, the dollars, per fluid ounces between the two brands of juice?

0.03

Step-by-step explanation:

Brand A:  11 fluid ounces and costs $2.31

2.31 / 11

0.21 per fluid ounce

Brand B:  15 fluid ounces and costs $2.70

2.70 / 15

0.18 per fluid ounce

Subtract:  

0.21 - 0.18

0.03

 0.03

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.