HIS walking rate was 1 mile per hour because 20min times 3 is 1 hour, and 1/3 times 3 is 1 mile thus 1mph if can plz mark brainliest
Answer:

Step-by-step explanation:
we have that
The formula for the surface area of the enclosed space is

Solve for P
That means ------> isolate the variable P
Subtract lw both sides


Multiply by 2 both sides


Divide by h both sides


Rewrite

Answer:
let the blank be x
2 + 900 + 4,000 +50,000 + 10 + x = 354912
x + 54912 = 354912
x + 54912-54912 = 354912 - 54912
x = 300,000
Step-by-step explanation:
hope that will help you