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Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
6. Simple Interest
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Exercise 1 Page 269

How do you calculate 20 % of $8?

$ 9.60

Practice makes perfect

In order to find the selling price of the pool noodle, we need to add the sales tax in dollars to the original price. Original price+ Sales tax= Selling priceFirst, we have to find the cost added by the tax, which is 20 % of $8. We can find the value of the sales tax by multiplying the original price by the tax rate.

$8* 20 %
WriteDec

Write as a decimal

$8* 0.2
UseCalc

Use a calculator

$1.60

Finally, by adding $1.60 to $8, we get the final selling price. $8+ $1.60= $ 9.60

Subchapter links expand_more
arrow_right Try It p.266-267
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Try It 2 (Page 267)
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arrow_right Self-Assessment for Concept & Skills p.267
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Self-Assessment for Concept & Skills 5 (Page 267)
Self-Assessment for Concept & Skills 6 (Page 267)
Self-Assessment for Concept & Skills 7 (Page 267)
arrow_right Self-Assessment for Problem Solving p.268
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arrow_right Review & Refresh p.269
Review & Refresh 1 (Page 269)
Review & Refresh 2 (Page 269)
Review & Refresh 3 (Page 269)
Review & Refresh 4 (Page 269)
Review & Refresh 5 (Page 269)
arrow_right Concept, Skills, & Problem Solving p.269-270
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Concept, Skills, & Problem Solving 7 (Page 269)
Concept, Skills, & Problem Solving 8 (Page 269)
Concept, Skills, & Problem Solving 9 (Page 269)
Concept, Skills, & Problem Solving 10 (Page 269)
Concept, Skills, & Problem Solving 11 (Page 269)
Concept, Skills, & Problem Solving 12 (Page 269)
Concept, Skills, & Problem Solving 13 (Page 269)
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Concept, Skills, & Problem Solving 15 (Page 269)
Concept, Skills, & Problem Solving 16 (Page 269)
Concept, Skills, & Problem Solving 17 (Page 269)
Concept, Skills, & Problem Solving 18 (Page 269)
Concept, Skills, & Problem Solving 19 (Page 269)
Concept, Skills, & Problem Solving 20 (Page 269)
Concept, Skills, & Problem Solving 21 (Page 269)
Concept, Skills, & Problem Solving 22 (Page 269)
Concept, Skills, & Problem Solving 23 (Page 270)
Concept, Skills, & Problem Solving 24 (Page 270)
Concept, Skills, & Problem Solving 25 (Page 270)
Concept, Skills, & Problem Solving 26 (Page 270)
Concept, Skills, & Problem Solving 27 (Page 270)
Concept, Skills, & Problem Solving 28 (Page 270)
Concept, Skills, & Problem Solving 29 (Page 270)
Concept, Skills, & Problem Solving 30 (Page 270)
Concept, Skills, & Problem Solving 31 (Page 270)
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