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 = 7 cm, b = 9 cm and c = 14 cm. 
A. 12
sq. cm
B. 12
sq. cm
C. 12
sq. cm
D. 4
sq. cm
Answer: B
Mathematics
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Solve the formula for the specified variable.P = s1 + s2 + s3 for s3
A. s3 = s1 + s2 - P B. s3 = P - s1 - s2 C. s3 = P + s1 + s2 D. s3 = s1 + P - s2
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Answer the question.f(x) = 
Does 
f(x) exist?
A. No B. Yes
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Solve the problem.What will it cost to buy ceiling molding to go around a rectangular room with length 11 ft. and width 
The molding costs $2 per linear foot.
A. $44 B. $84 C. $42 D. $40
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Provide an appropriate response.Simplify: 
Fill in the blank(s) with the appropriate word(s).
Mathematics