Answer the question.True or False.Some rational numbers are irrational.
Answer the following statement true (T) or false (F)
False
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Express the number in decimal notation.7 × 10-7
A. 0.0000007 B. -700,000 C. 0.00000007 D. 0.000007
Solve the problem.The number of visitors to a tourist attraction (for the first few years after its opening) can be approximated by 
where x represents the number of months after the opening of the attraction. Find the number of visitors 16 months after the opening of the attraction.
A. 210 visitors B. 66 visitors C. 90 visitors D. 54 visitors
Use Cramer's rule to solve the system. x + 2y - 3z + w = 7 3x + 4y - z + 2w = 4-2x + y + z - w = -3 x - y + 2z - 2w = 1
A. 
B. 
C. 
D. 
Solve the problem.An arch in the form of a semiellipse is 52 ft wide at the base and has a height of 20 ft. How wide is the arch at a height of 12 ft above the base?
A. 35.5 ft B. 17.7 ft C. 20.8 ft D. 41.6 ft