Provide an appropriate response.Suppose X is normally distributed with mean 100 and standard deviation 20. Without using tables, determine the approximate value of P(80 < X < 100).
A. 0.50
B. 0.34
C. 0.68
D. 0.95
E. 0.997
Answer: B
Mathematics
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Write the expression with positive exponents only. Then simplify, if possible.2-3
A. 
B. 
C. -8
D. 8
Mathematics
Find the area of the circle. Use 3.14 or 
for ? as indicated.Find the area. Round the answer to the nearest tenth of a unit.
A. 27 mi2 B. 14.5 mi2 C. 58.1 mi2 D. 13.5 mi2
Mathematics
Find the distance between the pair of points.(3, -1) and (7, -3)
A. 12
units
B. 6 units
C. 12 units
D. 2
units
Mathematics
Solve the problem.To find the distance AB across a river, a distance BC of 995 m is laid off on one side of the river. It is found that B = 105.3° and 
Find AB. Round to the nearest meter.
A. 315 m B. 381 m C. 378 m D. 312 m
Mathematics