Write the number in words.500,438
A. fifty thousand, four hundred thirty-eight
B. five hundred thousand, four hundred thirty-eight
C. five thousand, four hundred thirty-eight
D. five hundred four thousand, thirty-eight
Answer: B
Mathematics
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Solve the problem.The length ? of a metal rod used in manufacturing cars must not differ from the standard s by more than 0.4 inches. The manufacturing engineers express this as 
Find the limits of ? if the standard s is 22.9.
A. 23.3 ? ? ? 23.7 B. ? ? 22.5 or ? ? 23.3 C. ? ? 23.3 or ? ? 23.7 D. 22.5 ? ? ? 23.3
Mathematics
Decide whether the equation is or is not an identity.tan 
= -cot ?
A. Not an identity B. Identity
Mathematics
Evaluate the sum.
?
?
A. -245 B. -45 C. -125 D. -250 E. 125
Mathematics
Factor the trinomial completely.
A. 
B. 
C. 
D. 
E. not factorable
Mathematics