#### Answer

a. $26,317$
b. The formula overestimates the actual cost by $44
c. $29,099$

#### Work Step by Step

$T = 26x^2 + 819x + 15,527 $
a. 2010 is 10 yrs after 2000, x=10.
$T(10) = 26(10)^2 + 819(10) + 15,527 = 26,317$
b. formula: 26,317
graph:26,273
$26,317-26,273=44$
c.2012 is 12 yrs after 2000, x=12.
$T(12) = 26(12)^2 + 819(12) + 15,527 = 29,099$