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96. World grain demand. Freeport McMoRan projects that in 2010 would grain supply will be l.8 trillion metric tones and the supplly will be only 3/4 of world grain demand. What will world grain demand be in 2010?

94. Fahrenheit temperature. Water boils at 212 F.

a. Use the accompanying graph to determine the Celsius temperature at which water boils.

b. Find the Fahrenheit temperature of hot tap water at 70C by solving the equation

70=5/9 (F-32)/

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#### Solution Preview

Well, for the world grain demand problem, let's extract the essential info from the prolem.

supply = 1.8 trillion
supply = 3/4 of the demand
demand = ?

For short, let's the supply be s, and the demand be d. Then we have an equation for s and d:

s = 3/4 * d
After substituting the value of s that we know, we get
1.8 = 3/4 * d
with one unknown, d. There's a number that multiplies d ...

#### Solution Summary

Help is given to determine the Celsius temperature at which water boils.

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