Solve the equation.log3 (x2 - 2x) = 1
A. {-3, 1}
B. {1}
C. {3, -1}
D. {3}
Answer: C
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Write the number in scientific notation. ? 22,250.4 ?
A. 2.22504 × 102 B. 22,250.4 × 102 C. 22,250.4 × 104 D. 2.22504 × 104 E. 2.22504 × 103
Solve the problem.In electronics, the impedance Z of an alternating series circuit is given by the formulaZ = 
, where R is the resistance and X is the reactance, both in ohms. Find the value of the impedance Z if 
and X = 48 ohms.
A. 28 ohms B. 52 ohms C. 68 ohms D. 44 ohms
Solve the problem.Under standard conditions, molecules of a gas collide billions of times per second. If each molecule has diameter t, the average distance between collisions is given by 
where n, the volume density of the gas, is a constant. Find 
.
A. 
= - 
B. 
= 
C. 
= - 
D. 
= 
What is the total current if: I1 = 2 A R1 = 5 ê R2 = 15 ê
´ R2 Ã I1 = ³ ÄÄÄÄÄÄÄ ³ IT. ’ R1 + R2 Å What will be an ideal response?