Wendy took a trip from one city to another, a distance of 240 mi. She traveled part of the way by bus, which arrived at the train station just in time for Wendy to complete her journey by train. The bus averaged 50 mi/h, and the train averaged 65 mi/h. The entire trip took 4 1 2 h. How long did Wendy spend on the train

3x + 4y -25 =0 represents the amount of change sianna should recieve

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.