Chapter 2 - Real Numbers - 2.3 - Real Numbers and Algebraic Expressions - Problem Set 2.3 - Page 69: 85

Tanya paid $10,002 dollars for 650 shares.

Multiply the number of shares bought by the cost per share for one stock. Then repeat the same process for the second stock and add the cost for both stocks. $= 400(14.78) + 250(16.36)$ $= 5912 + 4090$ $= 10,002$ dollars Tanya paid $10,002 dollars for 650 shares.