When we subtract 15.54 from 508.9538 using the rules for significant figures, the answer would be <span>493.41.
</span>The rule for adding and subtracting numbers is that the lowest decimal places should be followed for the answer to be in a significant figure.<span>
</span>I hope my answer has come to your help. Thank you for posting your question here in Brainly.
Having in mind that a spontaneous process is capable of proceeding in a given direction without needing to be driven by an outside source of energy, then it must occur naturaly. This is actually spontaneous. Also take into account that in order to define a spontaneous pattern we need to state no work performed on the system or on the surroundings.
Answer:
Explanation:
Given
Wall is 
in area
requires 1 gallon of paint
so using unitary method
gallon of paint
wall will require 
gallons of paint
