I run a 4:32 in a 40 yard dash and I'm 15 years old is that fast?

Yes, considering your age, your 40-yard dash time is considered to be well above average. In fact, your 40-yard dash time is above the average of a college football player, and in the average of NFL players.

4:32 means a 4 hour and 32 minute 40 yard dash.
No that is not fast
If you meant you run a 4.32 second 40 yard dash at 15 years old we'd flat out know you are lying and full of BS.

That is extremely fast considering that you are totally full of ****.

That's a little faster than the average time kids claim on here.

BULLSHIT! If you were that fast, 1: you would know that's fast, and 2: we would know your name. Someone's ego needs stroking... You don't have to lie to kick it

forget about high school. with that time you should be in the NFL today.

There are probably only about 25 players in the NFL with faster times.
Some are wide receivers but most are corners. You got world class speedson. How come you are not on the US Olympic team? Every college in the country will e offering you a scholarship. Maybe you could play football and run track for Oregon. Too bad you were not a few years older, you could have been a wide out with Marcus Mariota. You would have scored at least 100 tds a year. For sure the Heisman and 1st overall draft pick.
I gota call Bulls*it !!!

here's a wikipedia page of NFL records of the 40 yard dash at the NFL Combine -

https://en.wikipedia.org/wiki/40-yard_dash#Records

That's extremely good. That's pro football WR or RB speed