Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The length of the treads is 
The length of the risers is 
Generally the slope of the staircase is

=> 
=> 
A. 485 is %3 of 500, but the deviation sets it slightly lower than that
The answer is . (one [point] 4)
((Yes, its correct, checked and took an exam on it))
Number of combinations = (6x5) ÷ 2 = 15
Answer:There are 15 combinations
B- 1.23 You can do that whit an app name photomath :D