Solve the problem.Tom and Larry are food inspectors at a cookie making company. Tom tests every 20th batch of dough for fat percentage. Larry tests every 28th batch of dough for carbohydrate percentage. If they both start working at the same time, which batch will be the first that they both test?
A. 35
B. 70
C. 140
D. 280
Answer: C
Mathematics
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Combine like terms in the expression. Answer "not possible" if terms cannot be combined.5x - 11xy
A. 32x B. 55xy C. not possible D. 16x2y
Mathematics
Solve the problem.The volume of a square pyramid is related to the length of a side of the base s and the height h by the formula 
How is dV/dt related to ds/dt if h is constant?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Evaluate the determinant.
A. -bc B. a - bc C. bc D. a + bc
Mathematics
Find the second-order partial derivative.Find fxy when f(x, y) = x4y5 - 
x7y8 + 17x - y.
A. 12x2y5 - 42
x5y8
B. 20x3y3 - 56
x6y6
C. 20x3y4 - 56
x6y7
D. 20x2y3 - 56
x6y6
Mathematics