Outward speed of salamander tongue

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The discussion focuses on the outward speed of a salamander's tongue during its projectile launch, detailing the acceleration phases with specific values of 405 m/s² and 120 m/s². A user calculates the area under the acceleration-time graph to determine the speed, initially arriving at 5250 m/s. However, they encounter an issue with the answer being marked incorrect. Another participant points out that the user failed to convert milliseconds to seconds, indicating that the final speed should be divided by 1000. The conversation highlights the importance of unit conversion in physics calculations.
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A salamander of the genus Hydromantes captures prey by launching its tongue as a projectile: The skeletal part of the tongue is shot forward, unfolding the rest of the tongue, until the outer portion lands on the prey, sticking to it. The figure shows the acceleration magnitude a versus time t for the acceleration phase of the launch in a typical situation. The indicated accelerations are a2 = 405m/s^2 and a1 = 120m/s^2. What is the outward speed of the tongue at the end of the acceleration phase?
http://edugen.wileyplus.com/edugen/courses/crs7165/art/qb/qu/ch0/EAT_13904629146110_9951108919932922.gif
i found the area under each part so from 0-10 was 0
from 10-20 was .5x10x120=600
from 20-30 was (10x120)+(.5x10(405-120))=2625
and from 30-40 was .5x10x405=2025
i added all them together and got 5250m/s but i am not getting the answer right. can you help me?
 
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Attach figure please.
 
The link is asking me to log in. Take a picture with your camera and upload it.
 
here is the graph
 

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Your solution appears to be right to me.
 
k i guess it is just a computer glitch. thanks so much for you help!
 
You forgot to change your units from milli seconds to seconds. Your answer must be divided by 1000.
 

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