Find the length of the unknown side of the right triangle. In each case, a and b represent the lengths of the legs and c represents the length of the hypotenuse.
b = 9, c = 15; find a
A. 14
B. 12
C. 15
D. 11
Answer: B
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Find the absolute value of the complex number.z = -11 + 9i
A. 2
B. 
C. i
D. 2i
Solve for the missing values. Round money to the nearest cent, rate to the nearest tenth of a percent, and time to the nearest day.Principal: 
Interest: $870Rate: 
Time: 329 daysMaturity value: $11,126
A. $10,256; 9.1% B. $10,456; 9.5% C. $10,256; 9.3% D. $10,256; 9.7%
A right triangle has legs a and b with hypotenuse c. Find the length of the missing side. Round the answer to three decimal places, if necessary.a = 3, b = 7
A. c = 21 B. c = 10 C. c = 7.616 D. c = 4.472
Use Euler circles to check the validity of the argument. ? No politicians are honest. Some dishonest people are found out. Therefore, some politicians are found out. ? The argument is __________. ?
A. not valid B. valid