Calculating Discounts and Sale Prices

Anika is shopping at a department store and finds a $40.00 dress marked, "Save 25%." What is the discount? What is the sale price of the dress?

(a)  

Answer explanation

To find the discount, calculate 25% of $40.00: 0.25 * 40 = $10.00. The sale price is then $40.00 - $10.00 = $30.00. Thus, the correct choice is Discount: $10.00, Sale Price: $30.00.

David is shopping for a $12.00 case of soda at the grocery store, and he sees a sign that says, "Get a 20% discount." What is the discount? What is the sale price of the case of soda?

• $2.40 discount, $9.60 sale price

• $2.00 discount, $10.00 sale price

• $3.00 discount, $9.00 sale price

• $1.20 discount, $10.80 sale price

Answer explanation

To find the discount, calculate 20% of $12.00: 0.20 x 12 = $2.40. The sale price is then $12.00 - $2.40 = $9.60. Thus, the correct choice is $2.40 discount, $9.60 sale price.

In a candy store, Zoe finds a $5.00 jar of candy labeled, "50% off." What is the discount? What is the sale price of the jar of candy?

• $2.50 discount, $2.50 sale price

• $2.00 discount, $3.00 sale price

• $1.50 discount, $3.50 sale price

• $1.00 discount, $4.00 sale price

Answer explanation

The jar of candy costs $5.00 with a 50% discount. The discount is calculated as 50% of $5.00, which is $2.50. Therefore, the sale price is $5.00 - $2.50 = $2.50. Thus, the correct choice is $2.50 discount, $2.50 sale price.

In a bicycle store, Sophia finds a $500.00 bicycle marked, "Get a 30% discount." What is the sale price of the bicycle?

• $350.00

• $400.00

• $450.00

• $500.00

Answer explanation

To find the sale price, calculate 30% of $500.00, which is $150.00. Subtract this discount from the original price: $500.00 - $150.00 = $350.00. Therefore, the sale price of the bicycle is $350.00.

Ava is buying a book that is on sale for $21.25. She has a coupon for 25% off. What is the sale price of the book?

• $15.94

• $16.25

• $15.00

• $14.50

Answer explanation

To find the sale price, calculate 25% of $21.25, which is $5.31. Subtract this from the original price: $21.25 - $5.31 = $15.94. Thus, the sale price of the book is $15.94.

During a biology class, Abigail and Michael were discussing what the term 'ecosystem' refers to. What is the correct definition?

• A community of living organisms interacting with their physical environment

• A single species living in isolation

• A group of planets in a solar system

• A technological network of computers

Answer explanation

The correct definition of 'ecosystem' is a community of living organisms interacting with their physical environment. This encompasses both biotic and abiotic components, unlike the other options which are unrelated.

During a biology class, Mason and Aiden were discussing the importance of biodiversity in maintaining healthy ecosystems. What does 'biodiversity' mean?

• The variety of life in the world or in a particular habitat or ecosystem

• The study of living organisms

• The process of species extinction

• The genetic modification of organisms

Answer explanation

Biodiversity refers to the variety of life in the world or in a specific habitat or ecosystem. It encompasses the different species, genetic variations, and ecosystems, making the first choice the correct definition.

Avery and Aria are part of an environmental club at their school. They are planning a project to help the local park. What is meant by 'conservation' in the context of their project?

• The act of preserving, guarding, or protecting; wise use.

• The process of destroying natural resources.

• The act of polluting the environment.

• The method of increasing resource consumption.

Answer explanation

In the context of their project, 'conservation' refers to the act of preserving, guarding, or protecting the environment, which aligns with their goal to help the local park.

While playing outside, Daniel noticed that the water in a puddle was disappearing over time. This is an example of:

• a) Liquid turning into gas

• b) Solid turning into liquid

• c) Gas turning into liquid

• d) Solid turning into gas

Answer explanation

The water in the puddle disappearing is an example of evaporation, where liquid water turns into gas (water vapor). Therefore, the correct answer is a) Liquid turning into gas.

David and Abigail are discussing the environmental changes in their town. David mentions 'deforestation' and its impact on the environment. What is 'deforestation' and its impact on the environment?

• Deforestation is the clearing of trees, transforming a forest into cleared land, which can lead to loss of biodiversity and climate change.

• Deforestation is the planting of trees to create a forest, which helps in increasing biodiversity and reducing climate change.

• Deforestation is the process of preserving forests to maintain biodiversity and prevent climate change.

• Deforestation is the natural growth of forests without human intervention, leading to increased biodiversity.

Answer explanation

Deforestation refers to the clearing of trees, which transforms forests into barren land. This process negatively impacts the environment by causing loss of biodiversity and contributing to climate change, making the first answer choice correct.