Solve the problem.The mass of one oxygen molecule is 5.3 × 10-23 gram. Find the mass of 2000 molecules of oxygen. Express the answer in scientific notation.
A. 1.06 × 10-20 g
B. 1.06 × 10-18 g
C. 1.06 × 10-19 g
D. 1.06 × 10-21 g
Answer: C
Mathematics
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Find the union.{a, b, c, d, e, f, g, h, i, j } ? { }
A. ? B. {a, b, c, d, e, f, g, h, i, j} C. {a, b, c, d, e} D. {e, f}
Mathematics
Tell whether the angle is acute, right, obtuse, or straight.
A. Obtuse B. Acute C. Right D. Straight
Mathematics
Simplify using order of operations.
A. -11 B. 8 C. 11 D. -8
Mathematics
Complete the ordered pairs so that each is a solution of the linear equation. Then plot each solution and graph the equation by connecting the points by a straight line.y = 2x + 5(0,
)(1,
)(-1,
)
A. (0, 0)
(1, 5)
(-1, -5)
B. (0, 5)
(1, 7)
(-1, 3)
C. (0, -5)
(1, -3)
(-1, -7)
D. (0, 5)
(1, 3)
(-1, 7)
Mathematics