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Questions in Grade Middle-school

[Open]What was life like for the people in Kush?

[Open]Describe how to use mental math to determine if a ratio is simplified.

[Open]The calendar developed by the Sumerians was based on:

[Open]Solve the equation: \[ 40a^2 + 4a = 0 \]

[Open]Simplify \(\frac{1}{9} \div \frac{15}{13}\).

[Open]List the steps that show how the sun provides the energy for surface ocean currents.

[Open]How did the Phoenician alphabet simplify writing?

[Open]What is the price of a triple pack of CDs if Rachel bought one double pack of CDs for $20, which is $4 less than \(\frac{3}{4}\) the cost of a triple pack of CDs?

[Open]Is \(\frac{2}{5}\) greater than 0.5?

[Open]Why must ferns, club mosses, and horsetails grow in moist surroundings?