Question

Olivia ties 2.5 feet of ribbon onto one balloon. How many yards of ribbon does olivia need for 18 balloons

Answer 1

15 yards of ribbon does olivia need for 18 balloons

Explanation:

Unit rate defined as the rates are expressed as a quantity 1 such as 4 meter per seconds or 5 miles per hours.

As pert the statement:

Olivia ties 2.5 feet of ribbon onto one balloon.

⇒
`\text{unit rate per balloon} = (2.5)/(1) = 2.5` ft ribbon

Use conversion:

1 feet = 1/3 yard

then;

2.5 ft = 0.833333333 yard

⇒
`\text{unit rate per balloon} = (2.5)/(1) = 0.833333333` yard ribbon

We have top find how many yards of ribbon does olivia need for 18 balloons

`\text{Number of ribbons} = \text{Unit rate per balloons} * 18`

Substitute the given values we have;

`\text{Number of ribbons} = 0.83333333 * 18 = 15` yards

Therefore, 15 yards of ribbon does olivia need for 18 balloons

Answer 2

`1yd=3ft\to1ft=(1)/(3)yd\\--------------------\\2.5ft\to1\ ballon\\\\therefore\\\\18*2.5ft=45ft\to18\ ballons\\\\45ft=45*(1)/(3)yd=\boxed{15yd}\leftarrow answer`