List all numbers for which the rational expression undefined.
A. -9, 4
B. -7, 7
C. -4, 9
D. -9
Answer: B
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Match the vector equation with the correct graph.
r(t) = (3 - 2t)i + tj; 0 ? t ? 
A. Figure 8 B. Figure 5 C. Figure 3 D. Figure 1
Divide the monomials.
A. 18k2 B. 18 C. 4k D. 4k2
Write the whole number in word form.64,568,009
A. Sixty-million, five thousand sixty-eight hundred, nine B. Sixty-four million, five hundred thousand, sixty-eight hundred, nine C. Sixty million, forty-five thousand, sixty-eight hundred and nine D. Sixty-four million, five hundred sixty-eight thousand, nine
Solve the problem.Suppose an animal feed to be mixed from soybean meal and oats must contain at least 100 lb of protein, 20 lb of fat, and 9 lb of mineral ash. Each 100-lb sack of soybean meal costs $20 and contains 50 lb of protein, 10 lb of fat, and 8 lb of mineral ash. Each 100-lb sack of oats costs $10 and contains 20 lb of protein, 5 lb of fat, and 1 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost? Fractional sacks are allowed.
A. 
sacks of soybeans and 
sacks of oats
B. 2 sacks of soybeans and 0 sacks of oats
C. 
sacks of soybeans and 
sacks of oats
D. 0 sacks of soybeans and 4 sacks of oats