Day 50 in Mat120

Today:

• Distribute Section 6.3 Worksheet

• No problems to return.

• Problems 5.3 and 5.4 collection opportunities.

• Questions on old stuff?
  • Problem 59, section 5.3

    A couple of problems:

    • I thought of the loss rate (and average cost) function as negative, which meant that I should have been looking for a maximum (not a min)!
    • Eventually, the loss of the item is total (generally), so that If the loss rate function is increasing with time (as it should be), then eventually it should become zero (when all the value is gone).
    • Assuming f(s)=7*s, here is C(t) without loss. Notice that f and c cross at the minimum
    • Assuming f(s)=7*s, here is C(t) with loss.

• Section 6.1:
  • worksheet study questions

  • section summary

  • Problems:
    • At seats: #1, 4, 40

• Quiz Opportunity over Section 6.2

• Section 6.2: disks and washers
  • worksheet study questions

  • section summary

  • Problems:
    • #2, 20, 45

Next time: Volumes as integrals