To determine how many plants Julianne will need, we follow these steps:

Step 1: Calculate the area of the rectangular space.

The area $A$ of a rectangle is given by the formula:

$A = \text{length} \times \text{width}$

Given:

• Length = 8.75 ft
• Width = 4.5 ft

$A = 8.75 \times 4.5 = 39.375 \, \text{square feet}$

Step 2: Calculate the number of plants needed per square foot.

The problem states that she needs 4 plants for every square foot of area. So, the total number of plants $P$ is:

$P = 39.375 \times 4 = 157.5$

Step 3: Round to the nearest whole number.

Since Julianne cannot buy half a plant, we round up to the nearest whole number:

$P = 158 \, \text{plants}$

Conclusion:

Julianne will need to buy 158 plants to complete her project.

Would you like more details or further clarifications?

Here are 5 related questions:

1. How would the calculation change if the area were circular?
2. What if each plant covered a different amount of square footage?
3. How would the result change if she planted fewer plants per square foot?
4. What would be the total cost if each plant costs $2.50?
5. How much area could be covered by a single plant if 4 plants cover 1 square foot?

Tip: Always round up when dealing with practical applications like purchasing materials to ensure full coverage.