Find the length of the unknown side of the right triangle with legs a and b and hypotenuse c. Round to three decimal places, if necessary.a = 4, b = 1
A. c = 5
B. c = 4
C. c = 3.162
D. c = 4.123
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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Solve the problem.An arch for a bridge over a highway is in the form of a semiellipse. The top of the arch is 35 meters above ground. The main span is 69.71 meters wide. Write an equation for the ellipse in which the x-axis coincides with the ground and the y-axis passes through the center of the arch.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
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Mathematics
Add or subtract. Express the answer as a mixed number.15
- 6
A. 8
B. 7
C. 8
D. 9
Mathematics