Indicate to which set(s) the number belongs from the following choices: natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers. The numbers may belong to more than one set.
A. whole numbers, real numbers
B. irrational numbers, real numbers
C. real numbers
D. rational numbers, real numbers
Answer: D
Mathematics
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A discrete probability distribution for a random variable X is given. Use the given distribution to find the requested information.Find E(X).pi = 
0.6i 0.43 - i, xi = i, i = 0, 1, 2, 3
A. 1.2 B. 1.5 C. 2.1 D. 1.8
Mathematics
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 42 ? 45
A. 262,144 B. 16,777,216 C. 16,384 D. 1,048,576
Mathematics
Factor.81x2 + 90xy + 25y2
A. (81x + 1)(x + 25) B. (9x + 5y)(9x - 5y) C. (9x + 5y)2 D. (9x - 5y)2
Mathematics
For the given function, find x when y is equal to the indicated value.f(x) = 
- 
, y = 3
A. -45 B. -90 C. 90 D. 45
Mathematics