Solve.A pendulum bob swings through an arc 50 inches long on its first swing. Each swing thereafter, it swings only 89% as far as on the previous swing. What is the length of the arc after 11 swings? Round your answer to two decimal places, if necessary.
A. 13.88 inches
B. 15.59 inches
C. 12.35 inches
D. 445 inches
Answer: B
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Perform the indicated operation. Express the answer in scientific notation.(2 × 10-8)(5 × 108)
A. 10 × 101 B. 1 × 101 C. 100 × 100 D. 1 × 10-64
Completely factor the polynomial or state that the polynomial is prime.36x2 - 1
A. (6x + 1)2 B. prime C. (6x - 1)(6x + 1) D. (6x - 1)2
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.-4x + 5y - 2z = 48x - 10y + 4z = -86x + 20y - 6z = -4
A. 
B. 
C. 
D. No solution
Determine the real zeros of the polynomial and their multiplicities. Then decide whether the graph touches or crosses the x-axis at each zero.f(x) = 2(x2 + 1)(x + 5)2
A. -5, multiplicity 2, crosses x-axis B. -5, multiplicity 2, touches x-axis C. -1, multiplicity 1, crosses x-axis; -5, multiplicity 2, touches x-axis D. -1, multiplicity 1, touches x-axis; -5, multiplicity 2, crosses x-axis