Solve the problem.Charles's law states that the volume V of a gas varies directly as its temperature T in kelvin, provided that the pressure and mass of the gas remains constant. (To convert a Celsius temperature to a kelvin temperature, add 273.) A container of gas has a volume of 450 milliliters at 8°C. If the gas is cooled and now has a volume of 390 milliliters, what is its temperature in degrees Celsius? Round your answer to the nearest hundredth of a degree as needed.
A. -29.47°C
B. 265.13°C
C. 6.5°C
D. 276°C
Answer: A
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The scores on a driver's test are normally distributed with a mean of 100.Find the score that is 2 standard deviations below the mean, if the standard deviation is 27.
A. 127 B. 73 C. 154 D. 46
Solve the problem.A stained glass window is composed of 20 triangular sections, each with sides 5, 7, and 7 in. Find the total area of the window (to the nearest square inch).
A. 3873 in.2 B. 16 in.2 C. 106 in.2 D. 327 in.2
Solve the equation.
= 2x2
A. {0, 7} B. {0, -7} C. {0, 7, -7} D. No real solutions
Solve the problem.An object is traveling around a circle with a radius of 10 centimeters. If in 20 seconds a central angle of 
radian is swept out, what is the linear speed of the object?
A. 
radians/sec
B. 6 cm/sec
C. 6 radians/sec
D. 
cm/sec