1. Use the Ebers-Moll model to determine Ic for an NPN BJT biased at IB = 150 nA and VCE = 0.25 V. Assume that the Ebers-Moll model parameters are IFO = 2.50 ×10-16A, • IRO 1.75 x10-16A, and αF = 0.996.

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Solve it step by step for me to understand

At the park there is a pool shaped like a circle. A ring-shaped path goes around the pool. Its inner radius is 10 yd and its outer radius is 14 yd. 10 yd 14 yd We are going to give a new layer of coating to the path. If one gallon of coating can cover 6 yd, how many gallons of coating do we need? Note that coating comes only by the gallon, so the number of gallons must be a whole number. (Use the value 3.14 for a.) I gallons of coating

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Please answer question (d).

Can you please clarify how to do these graphs? I think I've got the first two done, but then they start getting complicated, and I my scales are messed up. I have a program I can run to look at the answers, so getting the correct answer is not the problem, but can you tell me how to do them? And then I don't fully understand how to describe them either as I am instructed to do. Thank You!

Just prove by solution. It already has answers.

I need help with these problems. I don't know how to approach them. I want see detailed steps.