Answer:
a)
, b) 
Step-by-step explanation:
a) The instantaneous rate of change is:



b) The slope of the tangent line is equal to the instantaneous rate of change found previously.

Answer:
20 hours hope this helps :)
Step-by-step explanation:
Answer:
a^2-b^2=(a+b)(a-b) where a=4x and b=5. (4x+5)(4x-5)
Step-by-step explanation:
Since both terms are perfect squares,factor using the difference of squares formula