Answer:
The cost of one hamburger is $3.95.
Step-by-step explanation:
15.80/4=3.95
Domain: 
Range: 
Explanation:
The function is 
The domain of a function is the set of all input values for which the function is well defined. Generally, domain consists of all x-values of the function. Hence, the function
is defined in the interval
.
The range of a function is the set of output values obtained by substituting the value of x in the function. Hence, the function
is defined in the interval
.
Answer:
Evaluate each expression for a = 4, b = 2, and c = 5.
c − a
Answer:
there are four significant figures
Step-by-step explanation:
zeros to the right of a non zero digit are ambiguous