Use cross products to determine whether the proportion is true or false.
= 
A. True
B. False
Answer: A
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Solve the problem. Use a calculator with an LN or a LOG key.The long jump record, in feet, at a particular school can be modeled by 
where x is the number of years since records began to be kept at the school. What is the record for the long jump 
after record started being kept? Round your answer to the nearest tenth.
A. 23.2 ft B. 20.9 ft C. 22.9 ft D. 22.6 ft
Perform the indicated operation.
+ 
A. 
B. 
C. 
D. 
Find the special product.(2x - 9)2
A. 4x2 + 81 B. 2x2 + 81 C. 4x2 - 36x + 81 D. 2x2 - 36x + 81
An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to determine the maximum value of the objective function and the values of x and y for which the maximum occurs.Objective Functionz = 7x + 7yConstraintsx ? 0 0 ? y ? 5 2x + 3y ? 12 2x + 3y ? 20
A. maximum: 49; at (2, 5) B. maximum: -28; at (4, 0) C. maximum: 42; at (6, 0) D. maximum: 70; at (10, 0)