Use Heron's formula to find the area of the triangle. Round to the nearest square unit.a = 20, b = 15, c = 15
A. 118
B. 112
C. 115
D. 121
Answer: B
Mathematics
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Simplify.
? 
A. 
B. 6
C. 
D. 
Mathematics
Solve the problem.The formula 
represents the number of households N, in thousands, in a certain city that have a computer x years after 2010. According to the formula, in what year would there be 109 thousand households with computers in this city?
A. 2017 B. 2018 C. 2016 D. 2015
Mathematics
Evaluate. Write the answer as a mixed number whenever possible.One-tenth of 
A. 5000
B. 
C. 50
D. 
Mathematics
Write the equivalent value.1 minute = _____ seconds
A. 24 B. 60 C. 100 D. 360
Mathematics