Solve the problem.You have 84 feet of fencing to enclose a rectangular region. Find the dimensions of the rectangle that maximize the enclosed area.
A. 42 ft by 42 ft
B. 21 ft by 21 ft
C. 42 ft by 10.5 ft
D. 23 ft by 19 ft
Answer: B
Mathematics
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Express the number in decimal notation.8.1 × 105
A. 81,000 B. 8,100,000 C. 405 D. 810,000
Mathematics
Solve.The sum of the squares of the digits of a positive two-digit number is 20, and the tens digit is 2 more than the units digit. Find the number.
A. 35 B. 53 C. 42 D. 24
Mathematics
Graph the quadratic equation.y = -3 - 4x - x2
A. 
B. 
C. 
D. 
Mathematics
Tell which set or sets each number belongs to: natural, whole, integer, rational, irrational, real.3.5313719. . . (no discernible pattern)
A. Real, natural, irrational B. Real, irrational C. Real, rational D. Real
Mathematics