Use the properties of logarithms to find the exact value of the expression. Do not use a calculator.log4 21 ? log21 64
A. 21
B. 3
C. 4
D. 64
Answer: B
Mathematics
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Solve the equation.
= 
A. 3 B. -3 C. 11 D. -11
Mathematics
Solve the problem.Find the equation of the line which contains P(-7, 1) and which is parallel to the y-axis.
A. y = 1 B. y = -7 C. x = 1 D. x = -7
Mathematics
Solve the problem.Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, V, in volts, and the impedance of the circuit, Z, in ohms, by the formula 
Find the current I when the impedance is and voltage is V = -3i volts.
A. 
amperes
B. 
amperes
C. 
amperes
D. (-9 + 3i) amperes
Mathematics
Represent the quantity by an integer.The team gave up 8 points.
A. -8 B. 8
Mathematics