Answer:
2
Step-by-step explanation:
Substitute a = - 6 into the expression, that is
a² + 7a + 8
= (- 6)² + 7(- 6) + 8 = 36 - 42 + 8 = - 6 + 8 = 2
Substitute
in the above equation to get:
Simplify:
x + 4
2960 ft.........is the difference between -40ft and 3000ft