Juanita, the stadium manager, spends $10,000 on a broadcast tv ad, $15,000 on a cable tv ad, and $4,000 on a radio ad. what percentage of radio advertising did she do? (round to the nearest percent.)

First, we need to know what the total amount spent on ads was:
Broadcast TV ad = $10,000
Cable TV ad = $15,000
Radio ad = $4,000
Total amount spent on ads = $29,000

Next, we will divide the cost of the radio ad by the total amount spent to find the percentage spent on just the radio ad space.
Radio ad percentage = 4000/29000
Radio ad percentage = 0.1379 

Finally, we will multiply the 0.1379 by 100 and get the percentage.
Radio ad percentage = 13.79% 
If we round to the nearest percent, Juanita spent 14% on the radio advertisement.