Enrique drank 23⁄16 cups of coffee in 21⁄2 hours. how much coffee did he drink each hour?           a. 4⁄5 of a cup   b. 515⁄32 cups   c. 11⁄8 cups   d. 7⁄8 of a cup

7/8 cup/hr (Answer D)

Step-by-step explanation:

You're being asked to find the unit rate, the rate at which Enrique drank coffee each hour.  Divide 2 3/16 cups by 2 1/2 hours:

2 3/16 cups         35          5

=    ÷  = (35/16)*(2/5) = 70/80 cup/hr = 7/8 cup/hr

2 1/2 hours          16           2

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c