Here are the cash flows for two mutually exclusive projects: project c0 c1 c2 c3 a −$ 34,400 +$ 13,700 +$ 13,700 +$ 13,700 b − 34,400 0 0 + 43,200 a. at what interest rates would you prefer project a to b?

7.89%

Explanation:

We can find the IRR of Project A and Project B is 9% and 8% respectively

(please see the calculation in excel in attachment)

So if the interest rate below 8% then Project A is more profitable than project B.

You can find NPV of each project follow the decrease in interest rate in the excel attached.

first one

explanation:

a recipe serves 8 people, and calls for 5 lbs of apples and 2 cups of flour. you want to prepare it for 24 people. divide 24 by 8 to get 3, and then multiply your ingredients by 3.

so for 24 people, you'll need 15 lbs of apples, and 6 cups of flour.