Write a mathematical expression for the word phrase.Eleven is fewer than fifteen
A. 11 ? 15
B. 11 ? 15
C. 11 ? 15
D. 11 < 15
Answer: D
Mathematics
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Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 94% of the isotope left?
A. 256 years B. 600 years C. 300 years D. 309 years
Mathematics
Find the product.12b6(-11b6 - 3b5 - 9)
A. -132b12 - 36b11 - 108b6 B. -132b12 - 3b5 - 9 C. -132b6 - 36b5 - 108 D. -132b12 - 36b11 - 9
Mathematics
Solve the systems of equations by the addition method. 
A. {(0,0)}
B. {(-6, 4)}
C. infinitely many solutions; {
-6x + 4y = -6} or {
12y = -18 + 18x}
D. no solution; ?
Mathematics
Solve.- 
x - 2 = -22
A. 21.6 B. 28.8 C. 26.4 D. 24
Mathematics