Find $h _ { z x y } ( x , y , z )$

question 103

Multiple Choice

Find $h _ { z x y } ( x , y , z )$ for the function $h ( x , y , z ) = e ^ { 9 x } \cos ( y + 7 z )$ .
Select the correct answer.

• A) \(63 e ^ { 9 x } \cos ( y + 7 z )\)
• B) \(49 e ^ { 9 x } \sin ( y + 7 z )\)
• C) \(- 63 e ^ { 9 x } \sin ( y + 7 z )\)
• D) \(- 49 e ^ { 9 x } \cos ( y + 7 z )\)

---

Definitions:

Discount Rate

The interest rate used in discounted cash flow analysis to determine the present value of future cash flows, reflecting the investment's risk and the time value of money.

Net Present Value

A financial metric that calculates the difference between the present value of cash inflows and outflows over a period of time, used for assessing the profitability of investments.

Annual Net

The collective net amount or result, typically pertaining to earnings, income, or profit, achieved or calculated over one year.

Investment

The allocation of resources, usually money, in assets or ventures expecting future financial returns, appreciation, or income.