Find the unknown length in the right triangle. If necessary, round to the nearest tenth.
A. 8.5 cm
B. 78.5 cm
C. 157 cm
D. 12.5 cm
Answer: D
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 18 - x2, y = x2, x = 0
A. 
?
B. 162?
C. 81?
D. 
?
Solve the problem.The sum of three numbers is -11. The first, minus the second, plus 4 times the third, is -4. The third, plus 3 times the first, plus the second, is -21. What are the numbers?
A. -5, -5, -1 B. 5, 5, 1 C. No solution D. -5, -5, -5
Evaluate the expression using exponential rules. Write the result in standard notation.(4 x 105) x (5 x 102)
A. 2,000,000,000 B. 20,000,000,000 C. 200,000,000 D. 20,000,000
Solve using the substitution method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.3x + y = 132x + 9y = -8
A. (-5, -2) B. (5, 2) C. (-5, 2) D. (5, -2)