Circle Geometry and Sales Tax Calculations

Mrs. Groovy Groves guides students through various math problems, including calculating sales tax in Ohio, New Mexico, and Nevada, converting percentages to decimals, and solving circumference and diameter problems using pi. The video emphasizes understanding the conversion of percentages to decimals and applying these concepts to real-world scenarios.

What is the decimal equivalent of a 7.25% sales tax rate?

• 0.0725

• 0.00725

• 0.725

• 7.25

If an item costs $22, what is the total price including a 7.25% sales tax?

• $24.00

• $23.60

• $22.60

• $23.00

Which equation correctly represents the sales tax in New Mexico for an item costing 'c' dollars?

• t = c / 0.05125

• t = 0.5125c

• t = 0.05125c

• t = 5.125c

What is the sales tax rate in Nevada if the tax on a $10 item is $0.46?

• 0.046%

• 46%

• 0.46%

• 4.6%

How do you express the sales tax in Nevada as an equation for an item costing 'c' dollars?

• t = c / 0.046

• t = 4.6c

• t = 0.46c

• t = 0.046c

What is 3.8% of 25?

• 95

• 0.95

• 9.5

• 0.095

Convert 180.5% to a decimal.

• 1.805

• 1805

• 18.05

• 0.1805

What is the formula for the circumference of a circle?

• C = 2d

• C = πd

• C = πr²

• C = 2πr

If the radius of a circle is 13, what is the diameter?

• 26

• 13

• 6.5

• 39

A circle has a circumference of 75.4. What is the approximate diameter?

• 75.4

• 37.7

• 12

• 24