Solve.If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its area. If a, b, and c are the three lengths of the sides, Heron's formula for area is: A = 
where s is half the perimeter of the triangle, or s = 
(a + b + c).Use this formula to find the area of the triangle if a = 9 cm, b = 11 cm and c = 16 cm. 
A. 3
sq. cm
B. 18
sq. cm
C. 180
sq. cm
D. 18
sq. cm
Answer: D
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Solve the problem.V = 
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A. 10.0 cm3 B. 10.2 cm3 C. 9.8 cm3 D. 1.0 cm3
Simplify.-| -20 | - | -25 - 2 |
A. -47 B. 47 C. -7 D. 7
Find the x- and y-intercepts of f.f(x) = x2(x - 2)(x - 1)
A. x-intercepts: 0, -2, -1; y-intercept: 0 B. x-intercepts: 0, -2, -1; y-intercept: 2 C. x-intercepts: 0, 2, 1; y-intercept: 2 D. x-intercepts: 0, 2, 1; y-intercept: 0
Give the maximum number of zeros the polynomial function may have. Use Descarte's Rule of Signs to determine how many positive and how many negative zeros it may have.f(x) = 4x3 - 5x2 + x + 9
A. 3; 2 or 0 positive zeros; 2 or 0 negative zeros B. 3; 2 or 0 positive zeros; 1 negative zero C. 3; 2 or 0 positive zeros; 1 or 0 negative zeros D. 3; 3 or 1 positive zeros; 3 or 1 negative zeros