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Solve. The half – life of silicon – 32 is 710 years. If 30 grams is present now, how much will be present in 300 years? (Round your answer to three decimal places.)

x + y = 02x +3y = -7{“version”:”1.1″,”math”:”x + y = 02x +3y = -7″}Solve the system of the equations by substitution for x.   

Write the first four terms of the sequence define by the recursion formula.  a1=-2 and an=-3an-1 for n≥2{“version”:”1.1″,”math”:”a1=-2 and an=-3an-1 for n≥2″}

Evaluate the given binomial coefficient.  62{“version”:”1.1″,”math”:”62″}

Find the slant asymptote, if any, of the graph of the rational function.  f(x) = x2+5x-3x+9{“version”:”1.1″,”math”:”f(x) = x2+5x-3x+9″}

Solve the exponential equation. Express the solution set in terms of natural logarithms.  ex+5=2{“version”:”1.1″,”math”:”ex+5=2″}

Evaluate the expression without using a calculator.  eln9x3{“version”:”1.1″,”math”:”eln9x3″}

Find the domain of the logarithmic function.  f(x) = log(x+9x-4){“version”:”1.1″,”math”:”f(x) = log(x+9x-4)”}

Complete the square and write the equation in standard form. Then give the center and radius of the circle.  x2 + y2 +4x +10y =7{“version”:”1.1″,”math”:”x2 + y2 +4x +10y =7″}

Write the first five terms of the geometric sequence.  a1=-5, r=-4{“version”:”1.1″,”math”:”a1=-5, r=-4″}