suppose+the+population+of+a+small+town+is+16000+and+growing+exponentially+at+2.2+%.+how+many+years+until+the+population+reaches+25000?

  20.5 years

Step-by-step explanation:

The population is given by the exponential function ...

  p = 16000·(1 +0.022)^t

When p = 25000, we can find the value of t by taking logarithms.

  log(25000/16000) = t·log(1.022) . . . . . divide by 16000, take the log

  t = log(25/16)/log(1.022) ≈ 20.5 . . . . . . divide by the coefficient of t

It will take about 20.5 years for the population to reach 25000.

$35.66

Step-by-step explanation:

$17.99 shirt x 20% discount = $3.60

$17.99 reg price tshirt - $3.60 discount = $14.39 per shirt

$14.39 per shirt x 3 shirts = $43.17 before taxes

$43.17 sale price for 3 shirts - $10 coupon = $33.17 base price

$33.17 x 7.5% sales tax = $2.49

$33.17 + $2.49 = $35.66 total