Pre Calc Due 2:30 PM DO_NOW Tue 3/31B Classwork SAT Percent Mr. Mui

Due 2:30 PM

DO_NOW Tue 3/31B SAT Percent

100 points

Andrew Mui 8:07 AM

Monday 20200330A & Tuesday31B_DO_NOW
DO NOW:
Open this week’s ShopRite shopping flyer I’ve attached. There are different items on sale whose price is shown, either per pound (lb) or for 2lbs. “Go shopping” and pick ONE of these food items (that YOU like to eat; DO NOT copy or use someone else’s !!). Answer these questions:
How much is TEN pounds of the item? ___

In New Jersey, sales tax is 7%. However, groceries are not taxed. What is the amount of total taxes on the TEN pounds you didn’t have to pay (so you saved!) ? ___
How do you eat or cook the food you selected? ________________
**D O N O T submit someone else’s work as your own!! 

 (Click Link to enlarge)

Classwork LESSON: Percent Problems on the SATs

Lesson: The following is a typical percent problem that you will encounter on the SAT (I am explaining it here AND I’m giving you a video to watch which summarizes all the steps):
Let’s say you own a store and sell customized cellphone cases. You buy each case for $16.80. Since you are a business (and want to make money!), you want to create a buzz and get lots of customers into your store, so you hold a “sale” and advertise that this week, the cases are 25% off!!

You also still want to make a profit and your goal is to make 25% on each case so that you can pay the rent on the store and eventually be rich (when you sell enough!).

How do you make a 25% profit AND get the customers to “feel good” by them taking 25% off of the listed price when they bring their cases to the cashier? In other words, what price do you “sell” each case for; what price should your sign say for a cellphone case?

Step 1: “mark-up” your $16.80 cost by 25% to give yourself a 25% profit: $16.80 x (1.25) = $21.00
{note the “1.25” factor is how you mark-up by 25%}

Step 2: Figure out what total price you should advertise so that the customer can take 25% off, and you will still receive $21.00 for each case:
Set equation up: 21 = (0.75) x (Advertised TOTAL Price)
Divide both sides by 0.75
{note the “0.75” factor is how you discount, or “take off” 25%}

Advertised TOTAL Price = 21/0.75 = $28 <<THIS IS WHAT YOU SHOULD SELL EACH CASE FOR

CAUTION: do not simply multiply $21 by the 1.25 factor again! If you do, the WRONG answer (26.25) is right there in the multiple choices “waiting to trap you”. DO NOT PICK IT!

Watch VIDEO (it’s only 4mins long & it’s by a Yale graduate!):
“SAT Percent Problems”
https://www.youtube.com/watch?v=kmRy7r8cyrg


ANSWER THESE QUESTIONS
(do YOUR OWN work; do not copy a friend’s!)

Question #1 Each case got more expensive for you to buy. They cost you $17 now. How much do you sell each for to get a 25% profit AND can have customers take a 25% sale discount?
Work__________________ Answer___________

Notes: Work: step 1) Mark up the 17 by 25% = 1.25 * 17 = 21.25
step 2) Take 25% off that price (leaves 75 % ) .75 * 21.25= 15.9375 rounding = 15.94 answer

Question #2 You sell car mounts for cellphones. They cost you $20 each. How much do you sell each for to get a 30% profit AND can have customers take a 25% sale discount?
Work__________________ Answer___________

Notes: Work: Step 1 : mark up by 30 percent: 1.30 * 20 =  26.00
Step 2: 25% sale discount (leaves 75%) .75 * 26.00 = $19.50 answer

Question #3 You sell screen protectors for cellphones. They cost you $5 each. How much do you sell each for to get a 40% profit AND can have customers take a 30% sale discount?
Work__________________ Answer___________

Notes: 40% profit: 1.40 * 5.00 = 7.00
30% sale discount = .70 left .70 * 7.00  =  answer $4.90

**D O N O T submit someone else’s work as your own!!  End