# Help on Rocket Injector Equation

Hello can someone explain me how can I get the value of (6340) because when I try to solve the given values on the book I get (6423.980075) when I round it off it is still not the right answer can someone help me please

ρ=44.5 lb/ft³ g=32.2 ft/sec² ΔP=100 convert to lb/ft² = 14400 lb/ft²

My Solution √(2x32.2)(44.5)(14400)=6423.980075 Please tell me how can I get 6430 instead of 6423 help

• Are you going to addess the concerns raised on your last couple of questions? Commented Feb 13, 2020 at 11:54
• Idk please help me on this one I already figured the other one Commented Feb 13, 2020 at 14:35
• If you already solved out your first problem perhaps you could add your solution as an answer, or mark the existing answer as correct and accepted if it was helpful? Commented Feb 13, 2020 at 15:16
• I had marked the existing answer correct Commented Feb 13, 2020 at 15:27
• 6430 is pretty suspiciously round, given the numbers that allegedly went into it. I expect that the authors have just used some unreasonable rounding somewhere, or a slightly odd value for one of the constants. The final area ends up being within 0.000001in^2 of the given answer. Commented Feb 14, 2020 at 8:05