Perform the indicated operation without the use of a calculator and express each answer in scientific notation.(0.000005) × (80,000)

A. 4 × 10-10
B. 4 × 10-2
C. 4 × 10-1
D. 4 × 10-24


Answer: C

Mathematics

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Find the value of c for which the expression is a perfect-square trinomial. Then factor the perfect-square trinomial.x2 + 8x + c

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