Question

Find the number which is 0.46 more than 2/25 of itself

Answer 1

If the number is n, then n=2n/25+0.46; 23n/25=0.46; divide both sides by 23: n/25=0.02, so n=0.02*25=0.5.

CHECK

2/25 of 0.5=1/25=0.04. Add 0.46 to 0.04=0.5, which is the same as n.

Answer 2

For each of the following models you will be using these parameter values: M = 142600, r = 0.2119, and H = 3777.

1. For the exponential model, if the initial population ( y(0) ) is 1420,
   (Symbolic) write the equation for y in terms of t.
   • (Symbolic) write the equation for y in terms of t.
     Note: Use ONLY the variable t. If you need to denote "e" remember to use the "exp" format (just like in Excel!).
   • y (t) =
   • what is the population at t=15?