#### Determine how much is borrowed at each given rate

A city zoo borrows $2,000,000 at simple annual interest to construct a breeding facility. Some of the money is borrowed at 9%, some at 10%, and some at 13%. Use a system of linear equations to...
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#### calculating mass/volume at STP

1) What is the mass of 75.0 L of methane gas (CH₄) measured at STP?2) What volume, in liters, will be occupied by 48.8 g of helium gas at STP?3) What volume, in liters, at STP, is occupied by 3.30...
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