Factor, if possible.u2 - 8u + 15
A. (u - 5)(u - 3)
B. (u + 5)(u - 3)
C. (u + 5)(u + 3)
D. (u - 5)(u + 3)
Answer: A
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Plutonium-239 is a primary component of modern nuclear weapons. If there is initially 6 kilograms, then after t thousand years, the amount remaining is given by
.
Over what time range will there be between 1 and 2 kilograms of plutonium-239 remaining? Round your answer to two decimal places.
A. From 38.36 to 62.56 thousand years B. From 20.27 to 24.77 thousand years C. Up to 62.56 thousand years D. Up to 20.27 thousand years
Solve using the addition principle.-10 = 11 + f
A. 21 B. -21 C. 1 D. -1
Tell whether the statement is true or false.Every whole number is a real number.
A. True B. False
Provide an appropriate response.In a leap year, February has 
days.
A. 30 B. 29 C. 28 D. 31