Find the product.5 ? 28
A. 40
B. 135
C. 140
D. 1400
Answer: C
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Express the number in standard notation.2.0433 × 10-7
A. 0.000000020433 B. 0.0000020433 C. 0.00000020433 D. -204,330,000
Place the correct symbol, >, <, or =, in the blank in the given pair of fractions.
A. > B. = C. <
Provide an appropriate response.Simplify: 
What will be an ideal response?
Solve the problem.An electronics company kept comparative statistics on two products, A and B. For the years 2005 to 2013, the total number of Product A ever sold (in thousands) is given by the equation 
, where x is the number of years since 2005. For that same period, the total number of Product B ever sold (in thousands) is given by the equation B = -30x + 434, where x is the number of years since 2005. Choose the statement that most accurately describes the solution of the system of equations.
A. At about 1.8 years (to the nearest tenth) from 2005, both products had sold the same amount. B. Product B sold 1.8 times as many as Product A. C. At some point between 2005 and 2013, both products had sold 1800 each. D. When 375,000 of Product A had been sold, Product B had sold 1.8 times as many.