Polly and Gerald went for a fun afternoon riding mini race cars at the munchkin track, which is a one-quarter mile circular track. Polly managed to circle the track 12 times in one half hour, but Gerald's car was malfunctioning, and he only moved at an average speed half of what Polly did.  What speed did Gerald's car average, in miles per hour?
Polly circled the one-quarter mile track 12 times in 0.5 hours at a speed of 12/0.5=24 circuits of the track per hour.
24/4 = <<24/4=6>>6 miles per hour
Gerald traveled at a speed half of what Polly traveled for an average speed of 6/2=<<6/2=3>>3 miles per hour.
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Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

A group of science students went on a field trip. They took 9 vans and 10 buses. There were 8 people in each van and 27 people on each bus. How many people went on the field trip?The vans held 9 vans * 8 people = <<9*8=72>>72 people.
The buses held 10 buses * 27 people = <<10*27=270>>270 people.
The total number of people on the field trip is 72 + 270 = <<72+270=342>>342 people.
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Nikola is saving up for a bag of ant food before he can start his ant farm. He wants 400 ants in his farm. Each ant needs 2 ounces of food. Every ounce of ant food costs $.1. Nikola is saving up by raking leaves. He charges $5 to start a job and then he charges by the leaf. Each leaf he rakes costs 1 penny. He finally saved up enough money after he raked 6,000 leaves. How many jobs did he complete?The ants will need 800 ounces of food because 400 x 2 = <<400*2=800>>800
The ant food will cost $80 because 800 x .1 = <<800*.1=80>>80
He has earned $60 from the leaves he has raked because 6000 leaves * $0.01/leaf = $<<6000*0.01=60>>60
He earned $20 from all his jobs because 80 - 60 = <<80-60=20>>20
He completed 4 jobs because 20 / 5 = <<20/5=4>>4
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Now, solve this next question in the style of the above examples:

Polly and Gerald went for a fun afternoon riding mini race cars at the munchkin track, which is a one-quarter mile circular track. Polly managed to circle the track 12 times in one half hour, but Gerald's car was malfunctioning, and he only moved at an average speed half of what Polly did.  What speed did Gerald's car average, in miles per hour?

### Response:
Polly circled the one-quarter mile track 12 times in 0.5 hours at a speed of 12/0.5=24 circuits of the track per hour.
24/4 = <<24/4=6>>6 miles per hour
Gerald traveled at a speed half of what Polly traveled for an average speed of 6/2=<<6/2=3>>3 miles per hour.
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