Day 24 in Mat120

Today:

• Distribute Section 3.9 Worksheet

• No problems to return.

• Quiz Opportunity

• Roll

• Problems 3.4 collection opportunity.

• Questions on old stuff?

• Section 3.6:
  • Yesterday: we were looking at an airplane landing: (this figure shows h of 35, l of 65).

  • We were at the point of figuring out how to calculate dy/dt. For that we can proceed in two ways:
    • solve for x as a function of time t, substitute this into y=P(x), and then differentiate y(t); or
    • simply differentiate P(x) with respect to time, and see what happens; or
    • use the chain rule.

  • Using differentials to derive the chain rule.

  • worksheet study questions

  • section summary

  • Problems:
    • At seats: identify f and g in 7-41 odd

Next time: related rates