Solve the problem.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 = 7 cm, b = 11 cm and c = 14 cm. 
A. 12
sq. cm
B. 3
sq. cm
C. 120
sq. cm
D. 24
sq. cm
Answer: A
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Find the first term and the common ratio for the geometric sequence. Round approximations to the nearest hundredth.a2 = 6.3, a5 = 58.34
A. a1 = 6.3, r = 2.1 B. a1 = 58.34, r = 0.48 C. a1 = 3, r = 2.1 D. a1 = 3, r = 0.48
The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.(- 4, - 2)
A. decreasing B. constant C. increasing
Solve the problem.Of all points (x, y, z) that satisfy 
, find the one that minimizes (x - 2)2 + (y + 1)2 + (z - 4)2.
A. 
B. 
C. 
D. 
Solve the system graphically. If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. Round to the nearest hundredth if necessary.x = y - 24x = 3y
A. (0, 0) B. (8, 6) C. (6, 8) D. (-6, 4)