Solve the problem.A rug is to fit in a room so that a border of even width is left on all four sides. If the room is 19 feet by 23 feet and the area of the rug is 285 square feet, how wide will the border be?
A. 3 ft
B. 4.5 ft
C. 2 ft
D. 4 ft
Answer: C
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Use a calculator to approximate the logarithm to four decimal places.log300 30
A. 0.5963 B. 1.677 C. 3.4012 D. 5.7038
Determine whether the equation defines y as a function of x.x = y2 + 4
A. Yes B. No
Use the shortcut for dividing numbers ending in zeros to find the quotient.
A. 30 B. 3 C. 1100 D. 70
Solve.The voltage across a resistor is jointly proportional to the resistance of the resistor and the current flowing through the resistor. If the voltage across a resistor is 
for a resistor whose resistance is 
and when the current flowing through the resistor is 
find the voltage across a resistor whose resistance is 
and when the
current flowing through the resistor is 
A. 36 volts
B. 18 volts
C. 72 volts
D. 8 volts