Unit Test #13

Select your answers to the following 5 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 

 

Q1:

 

A farmer has 500 metres of fencing. He wants to enclose the largest rectangular area he can.

A formula for the area A is:

A. A = 2ab 
B. A = 4ab
C. A = ab
D. A = 0.5ab

Answer 1:

 

 

Q2:

 

What is the value of b in terms of a for the rectangle in question 1? A. b = 250 - a
B. b = 250 - 2a
C. b = 500 +2a
D. b = 250 + a

Answer 2:

 

 

Q3:

 

In question 1, if A = a(250 - a) find A' A. A' = 250 - 2a
B. A' = 250 - a
C. A' = 500 - 2a
D. A' = 250a

Answer 3:

 

 

Q4:

 

The maximum value of a function f(x) occurs when: A. f ''(x) = 0
B. f '(x) > 0
C. f '(x) = 0
D. f '(x) < 0

Answer 4:

 

 

Q5:

 

What is the maximum value of f(x) = 4 - x2? A. 0
B. 2
C. -2
D. 4

Answer 5: