Solve the problem.Find the dimensions of a rectangle whose perimeter is 16 feet and whose area is 15 square feet.
A. 2 ft by 6 ft
B. 2 ft by 4 ft
C. 3 ft by 5 ft
D. 4 ft by 4 ft
Answer: C
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Use the definition f'(x) = 
to find the derivative at x.f(x) = 3x4 - 9x3 + 4
A. 3x3 - 9x2 + 4 B. 12x3 - 27x2 + 4 C. 3x3 - 9x2 D. 12x3 - 27x2
Complete the square to find the x-intercepts of the function.f(x) = x2 + 4x - 3
A. (2 + 
, 0)
B. (-2 + 
, 0), (-2 - 
, 0)
C. (-2 + 2
, 0), (-2 - 2
, 0)
D. (-1 + 
, 0), (-1 - 
, 0)
Find the perimeter.The local park district acquired lands to be used for a new dog park. How many yards of fencing are needed to enclose the dog park?
A. 401 yd B. 381 yd C. 460 yd D. 310 yd
Write the percent problems as equations or proportions and solve. Round to the nearest tenth or tenth of percent. 70% of what number is 39?
A) 56.7 B) 54.7 C) 57.7 D) 55.7 E) 53.7