Find the difference.Subtract 6.896 from 9820.22.

A. 9751.26
B. 9814.32
C. 9813.324
D. 9752.26


Answer: C

Mathematics

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Multiply and, if possible, simplify.(8p - q)(8p + q) - (p - 7q)2

A. 63p2 + 14pq - 50q2 B. 63p2 - 14pq - 50q2 C. 65p2 - 14pq - 50q2 D. 63p2 + 14pq - 48q2

Mathematics

Express the number in decimal notation.4.14 × 10-4

A. 0.0000414 B. -414,000 C. 0.000414 D. 0.00414

Mathematics

Provide an appropriate response.Solve the system of equations using the substitution method:3x + y = 5x = -2y

A. y = -1, x = -2 B. x = 2,  y = -1 C. inconsistent; no solution D. dependent; many solutions

Mathematics

Solve the problem.A sample of 600 grams of radioactive substance decays according to the function  where t is the time in years. How much of the substance will be left in the sample after 20 years? Round to the nearest whole gram.

A. 0 g B. 1 g C. 244 g D. 778 g

Mathematics