To find out how many volunteers Oakwood Elementary needs this year, we first need to determine the ratio of volunteers to booths from last year.
Last year:
- Volunteers = 70
- Booths = 14
The ratio of volunteers to booths is:
\[ \text{Ratio} = \frac{\text{Volunteers}}{\text{Booths}} = \frac{70}{14} = 5 \]
This means there are 5 volunteers for each booth.
This year, they want to have 42 booths. To find the number of volunteers needed this year, we multiply the number of booths by the ratio of volunteers per booth:
\[ \text{Volunteers needed} = \text{Booths} \times \text{Ratio} = 42 \times 5 = 210 \]
Thus, Oakwood Elementary needs 210 volunteers this year.