Simplify the expression.811/4
A. 12
B. 81
C. 
D. 3
Answer: D
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A water-filled ice tray is placed in a freezer that maintains a constant temperature of 6 degrees Fahrenheit. The table below shows the difference 
between the temperature T of the water in the ice tray, in degrees Fahrenheit, and the temperature the freezer.
t051015 D71.0057.8947.2038.49? A: Find an exponential model for the data. Be careful. The data are given in steps of 5 seconds. Round your answer to two decimal places, if necessery.B: Find a formula that gives the temperature T after t minutes. Round your answer to two decimal places, if necessery.C: Make a graph of T versus t over the first 30 minutes. Include the horizontal line representing the freezing temperature of water, 32 degrees.D: According to the model, how long does it take for the water to reach 32 degrees? Round your answer to two decimal places. What will be an ideal response?
Determine whether the given number is approximate or exact.One mole of an element contains 6.022 × 1023 atoms.
A. Exact B. Approximate
Solve the equation by making an appropriate substitution.x4 + 2x2 - 24 = 0
A. {-4, 6}
B. {2, i
}
C. {- 
, 
, -2i, 2i}
D. {-2, 2, -i
, i
}
Write the decimal number that has the specified place values.6 tens, 4 hundredths, 5 ones, 3 ten-thousandths, 1 thousandth, 3 tenths
A. 1,065.343 B. 65.3413 C. 35.6413 D. 65.03413