Math

Mathematical Reasoning

Name Set A pages 129-132 TOP 4 Use place-value strategies to find 20 X 80. Think about the pattern. Remember when the product of a basic fact has a zero, there is one more zero in the answer. Reteaching 20 x 80 = 2 tens x 8 tens = 16 hundreds = 1,600 Use a pattern to find each product. 1. 40 x 10 2. 60 x 20 3. 80 x 50 4. 30 x 90 50 x 40 = (5 x 10) (4 x 10) = (5 x 4) (10 x 10) = 20 x 100 = 2,000 5. 80 x 70 6. 60 x 60 7. 80 x 30 8. 20 x 50 Set B pages 133-136 Use an array or an area model to multiply Remember you can draw arrays or area models to represent multiplication problems. Draw a model to find each product. 20 x 14. + 20 groups of 10 = 200 1. 10 x 23 2. 16 x 20 + 20 groups of 4 = 80 200 + 80 = 280 So, 20 x 14 = 280. Set Cpages 137-140 Use compatible numbers to estimate 28 x 19. Remember that compatible numbers are numbers that are easy to compute with mentally Estimate each product. 28 is close to 25. 19 is close to 20. 1. 29 x 31 2. 42 x 49 If 25 x 2 = 50, then 25 x 20 = 500. 3. 73 x 18 4. 24 x 38 So, 28 x 19 is about 500. 6. 63 x 87 5. 19 x 31 Topic 4 Reteaching

Question 9 The Triple L investment club is considering purchasing a certain stock. After considerable research, the club members determine that there is a 55% chance of mak $10,000, a 25% chance of breaking even, and a 20% chance of losing $6,000. Find the expectation of this purchase. Round your result to the nearest cent. Enter your result in the space below. I

Two pipes can fill a tank in 33 minutes if both are turned on. If only one is used, it would take 56 minutes longer for the smaller pipe to fill the tank than the larger pipe. How long will it take for the smaller pipe to fill the tank? (Round your answer to the nearest tenth.) Answer How to enter your answer (Opens in new window) Keypad Keyboard Shortcuts minutes

A rectangle has a length of 30 feet less than 6 times its width. If the area of the rectangle is 4836 square feet, find the length of the rectangle. Answer How to enter your answer (opens in new window) Keypad Keyboard Shortcuts feet

Lionfish are considered an invasive species, with an annual growth rate of 65%. A scientist estimates there are 7,000 lionfish in a certain bay after the first year. Part A: Write the explicit equation for f (n) that represents the number of lionfish in the bay after n years. Show all necessary math work. (4 points) Part B: How many lionfish will be in the bay after 6 years? Round to the nearest whole number and show all necessary math work. (3 points) Part C: If scientists remove 1,300 fish per year from the bay after the first year, what is the recursive equation for f(n)? Show all necessary math work. (3 points) X 1 ce E 12 Source ✓c B 1 0 5 X, xº Ix • Ele 99 Styles Format | Font Size A- A

22. (-/1 Points] DETAILS WANEFMAC7 8.5.092. MY NOTES ASK Y If 40% of candidates for the soccer team pass the fitness test, and only 30% of all athletes are soccer team candidates who pass the test, what percentage of the athletes are candidates for the soccer team? 2 % Need Help? Read it Viewing Saved Work Revert to Last Response N Submit Assignment Save Assignment Progress

A local pizza shop has a membership program for frequent buyers. The membership costs $25 per month and members get a discounted price of $1.25 per slice of pizza. Tristan purchased a membership to this pizza shop. How much would Tristan have to pay the pizza shop if he bought 9 slices of pizza this month? What would be the monthly cost for 2 slices of pizza?

Maggie is having the flooring replaced in her kitchen, living room, and master bedroom. The kitchen is getting slate tile. The tile cost $1.73 per-square-foot plus an installation fee per-square-foot. The area of the kitchen is 120 square feet, and the total cost for the flooring with installation comes to $740.40. The living room is getting hand-scraped hardwood flooring. The hardwood cost $4.98 per-square-foot plus an installation fee per-square-foot. The area of the living room is 200 square feet, and the total cost for the flooring with installation comes to $1,688.00. The master bedroom is getting berber carpet. The carpet cost $2.48 per-square-foot plus an installation fee per-square-foot. The area of the master bedroom is 180 square feet, and the total cost for the flooring with installation comes to $928.80. Place the flooring type in order from the least to greatest installation fee per-square-foot. Tile Carpet Hardwood Flooring Em. All rights reserved.

During a one-month promotional campaign, Fran's Flix gave either a free DVD rental or a 12-serving box of microwave popcorn to new members. It cost the store $1 for each free rental and $2 for each box of popcorn. In all, 34 new members were signed up and the store's cost for the incentives was $61. How many of each incentive were given away? There were free rentals given away to new members. There were boxes of popcorn given away to new members.

Jamaican sprinter Usain Bolt won the 100 meter sprint gold medal in the 2012 Summer Olympics. He ran the 100 meter race in 9.63 seconds. There are about 3.28 feet in a mete and 5280 feet in a mile. What was Usain Bolt's average speed for the 100 meter race in miles per hour?

10. [-12 Points] DETAILS WANEFMAC7 8.1.024.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose two dice (one red, one green) are rolled. Consider the following events: A: the red die shows 1; B: the numbers add to 2; C: at least one of the numbers is 3; and D: the numbers do not add to 11. Express the given event in symbolic form. The red die shows 1, but the numbers do not add to 11. O AUD AUD O AND O AD O AND How many elements does it contain?

A company estimates that 0.6% of their products will fail after the original warranty period but within 2 years of the purchase, with a replacement cost of $350. If they offer a 2 year extended warranty for $30, what is the company's expected value of each warranty sold?

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