Round Your Answer to Four Decimal Places

Multiple Choice

$\text { Given } f ( x , y ) = 16 - x ^ { 2 } - y ^ { 2 } \text {, calculate } \Delta z \text { by evaluating } f ( 6,5 ) \text { and } f ( 6.4,5.29 ) \text {. }$ Round your answer to four decimal places.

A) -7.9441
B) -45.9441
C) -19.9441
D) 0.1118
E) -4.8882