Use an Euler diagram to determine whether the argument is valid or invalid.All tigers are felines.All felines are mammals.All mammals nurse their young.All tigers nurse their young.
A. Valid
B. Invalid
Answer: A
Mathematics
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Solve the problem.A tree casts a shadow 36 m long. At the same time, the shadow cast by a 49-centimeter tall statue is 90 cm long. Find the height of the tree. Round to the nearest tenth.
A. 66.1 m B. 18.1 m C. 19.6 m D. 64.6 m
Mathematics
Solve. Simplify the answer.A Boeing 767 flew 920 miles on a nonstop flight. On the return flight, it landed after having flown 530
miles. How far was the plane from its original point of departure?
A. 389
mi
B. 389
mi
C. 390
mi
D. 390
mi
Mathematics
Simplify. Express in terms of i.
A. -2
B. 2
C. -2i
D. 2i
Mathematics
Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.
A. x15
B. 
C. x14
D. 
Mathematics