Recent content by adamaero

Oh, I agree as a tool to determine a maximum allowable offer (MAO). But for the deal analysis as the question is posed it doesn't make much sense. Evaluating ROI also does not apply in this case and especially not for the purpose of my investment strategy. All investments will be put into...

Yes, this is used for commercial. I am exclusively looking at residential investments. So while it could be used for fun, an appraiser would not use it in their valuation (at least in my area). I realized two options could be a solution. I first tried to assume the cost to fix does not improve...

Say the annual return for a *used* widget producing machine is this: `12*500/(5000+15000)` = 30% It cost 5k for the loan to buy the machine and 15k to fix it to start. Two years later, it is refinanced for a 30 year term. Is that initial 15k still in the denominator? What if it was...

Thank you!

I It is just a random picture. Newton's method can be punched into an excel spreadsheet? How?

This equation takes a present value (PV) to find mortgage payments, PMT: Alternatively, switching V for PV and T for PMT: V/T = r(1-r^n)/(1-r) What is an algebraic method to solve for "r"? Can it not be solved for? I realize I can just find out "r" by trial by error in Excel using the PMT...

For first 6 months: I = PRT. Interest = ($10,000) * (3.54%) * (0.5 years) = $177. For next 6 months: I = PRT. Interest = ($10,177) * (7.12%) * (0.5 years) = $362. 10000(1+[0.5*3.54%+(1+3.54%*0.5)*7.12%*0.5]) = Ending balance = $10,177 + $362 = $10,539. $1000*9%*0.5 = afterSix = 45...

Say I bought $1000 worth of I bonds on August 1, 2022. For months 1-6, the overall interest rate is 9.62%. For months 7-12, say the overall interest rate is 6%. SI = Principal_1*Rate_1*Time 1000*9.62%*6 = SI CI = Principal_2*(1 + Rate_2)*Time − Principal_2 SI*(1+6%)*6 - SI Like this or?

Wait, the composite rate is already 9% as said here: http://eyebonds.info/ibonds/10000/ib_2022_08.html So what equation uses that composite rate of 9% for the first six months. So is that the simple interest rate for six months, and then it's compounded; then that gains simple interest for...

I Bonds are compounded semi-annually. What's the equation for an I Bond? https://www.wallstreetmojo.com/series-i-bond/ Overall Rate = [Fixed interest rate + (2 x bi-annual inflation rate) + (Fixed interest rate x bi-annual inflation rate)] Say the first 6 months is 9%, the next six months is 6%...

Three phase squirrel cage induction motor with given parameters (stator winding connected in delta) nominal power: Pn=22.4kW nominal stator voltage: Vsn=230V nominal stator current: Isn=39.5A nominal stator frequency: fsn=60Hz nominal speed: nn=1168min−1 number of pole pairs: 3 stator...

V(ρ) = V_o*ln(ρ/0.0018)/ln(45/180) (Attached picture is where the unit vector of r is really ρ.) In cylindrical coordinates ∇V = ρ*dV/dρ + 0 + 0 ∇V =derivative[V_o*ln(ρ/0.0018)/1.386]dρ ∇V = V_o*0.0018/(1.386*ρ) E = V_o*0.0012987/ρ Work = 0.5∫∫∫εE•E dv Bounds: 0.0018 to 0.00045 m D = εE =...

Hardware documentation Short datasheet: mouser.com/ds/2/389/x-nucleo-ihm02a1-954332.pdf Long datasheet: st.com/content/ccc/resource/technical/document/user_manual/group0/9c/49/e6/da/a3/75/48/b9/DM00237629/files/DM00237629.pdf/jcr:content/translations/en.DM00237629.pdf

I don't have a debugger yet, but my company is getting one... In the mean time, I've been un/commenting out parts of Mbed's code. Their Hello World program is available from this website, and it can be used directly in their online IDE by clicking "Import Program"...