Precalculus Homework 0 Due: Sunday, August 31, 2025
Homework 0: Platform Warm-Up
Easy & slightly silly review
Name: Class/Section:
Purpose. This practice assignment helps you make sure you can access,complete, and
submit work on the platform. It is not graded. Keep it light, but show your work where
asked.
Submission Instructions.
•Submit a single clear PDF or photo set through the platform.
•In the submission comment, type: I found the submit button!
•If you run into trouble, message me right away.
1. Quick function eval (the pizza model). Let P(t)=2t+ 5 be the number of pizza
slices in the math club room tminutes after the meeting starts.
(a) Find P(0) and explain in one short sentence what it means.
(b) Find P(10).
2. Domain speed check. For each expression, state any x-values that are not allowed (if
none, write “all real numbers”).
(a) 1
x−4Not allowed:
(b) √x−9 Not allowed:
3. Is it a function? Circle one for each relation.
(a) {(1,2),(1,3),(2,3)}Function Not a function
(b) Each student →their BIS ID number Function Not a function
4. Intercept cameo. For y= 2x+ 1, what is the y-intercept? (Answer as a point.)
5. Square-root sanity. Let g(x) = √x+ 9. Compute g(0) and g(7).
6. Very serious modeling (with rubber ducks). A very important function D(n) = 3n
counts the number of rubber ducks needed for nmath problems.
(a) How many ducks for n= 0?
(b) If you solved 5 problems, how many ducks does the model predict?
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