1/29 M&M Lab: Percent Error

1.  Warm-up:  Which situation represents the largest % Error?

a)  A recipe for cookies calls for 325 grams of flour.  A baker measures 342 grams and adds it to the ingredients.

b)  Using his knowledge of proportions and shadows, Andy was able to estimate that the flag pole was 28 feet high.  The actual height of the flag pole is 27 feet, 3 inches.


2.  M&M Lab: Percent Error

Instructions:

You DO NOT have permission to eat any M&Ms until your data has been recorded, and you have correctly calculated the % Error for each color.

a)  Open your bag of M&Ms on a paper towel
b)  Count the M&Ms
c)  The Mars Corporation reports that a bag of milk chocolate M&Ms should contain 55 candies.  Calculate the % Error of your bag.

d)  Pick up a M&M lab resource page from Table 5
e)  Fill in the data table on the resource page.
 
**Note:  For the "accepted" column, calculate how many M&Ms of each color there should have been given the amount of candies in your bag and the color percentages the Mars Co. reports.

f)  One member from your team enters data into our class data table (on Mr. R's computer)
g)  Begin working on the "Regents Questions" on the back side of the resource page
h)  Once all teams have entered data, we will calculate the % Error for the 7 combined bags that we opened.


No Homework this weekend!  Reminder: Percent Test on Tuesday

1/28 Percent Error

Percent Test next Tuesday

1.  Warm-up:  Grab your computer, log-on to Google Classroom, and take out your % Challenge Problems.

Discussion:  How to correct your work

2.  Percent Error Lesson

• Objective:  I will solve problems involving percent error
• Gathering Data:  Measuring Mr. R's whiteboard
• Discussion:  Absolute error vs. percent error
• Notes, examples, and practice

3.  Percent Error problems in Google Classroom (start at the bottom of page 2)

Homework:  Corrected Percent Challenge Problems are due tomorrow

1/27 Lessons 7.2.1 & 7.2.2 Solving Proportions

1.  Warm-up:  You are in line at Best Buy about to purchase the next best video game.  It's original price is $60, but you have a coupon for a 20% discount.  You know that you will have to also pay 8% tax on your purchase.  

Would it be a better deal to use the coupon and then pay tax, or pay the tax first and then use the coupon?  Explain how you know using math evidence.

2.  Lessons 7.2.1 & 7.2.2 Solving Proportions

• Objective:  I will solve proportional relationships using multiple strategies
• Problems 96 through 98 in teams.  Be prepared to discuss the different strategies that you have used.
• Discussion:  What strategies did you practice?
• Another strategy:  Fraction Busting (cross-multiplication)
• Try 2 example problems
• Problems 99 and 109 in teams

Homework:  Lesson 7.2.1 R/P

1/26 Percent Challenge Problems

1.  Warm-up:  Simple Interest Problem #89 on page 417

2.  Percent Challenge Problems (in Google Classroom)

• How to structure your responses
• How is this graded?
• Due this Friday, 1/29

Homework:  Work on Percent Challenge Problems (you should be finished with at least 6)

1/25 Lesson 7.1.8 Simple Interest

1.  Warm-up:  The Game!

Coach Nagler wants to buy tickets to the Super Bowl (go Panthers!).  Tickets cost $1,525 each plus 8% sales tax.

a)  Write an equation (rule) that relates the total cost to the number of tickets purchased.

b)  Use your rule to find out how much 8 tickets cost.


2.  Lesson 7.1.8 Simple Interest

• Objective:  I will solve problems involving simple interest
• Discussion:  What is interest?  What is an interest rate?
• Problem 86 as a class
• Problems 88 and 89 in teams

Homework:  Lesson 7.1.8 R/P