I got 1st part of a right and part b right. rest you can see i got wrong. Part a

Question

I got 1st part of a right and part b right. rest you can see i got wrong. Part a magnitude & part c i need help. I italize the part i got wrong

1. A motorist drives south at 20.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 3.00 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 7.00 min trip, find the following values.

(a) total vector displacement
___6190____ m------Correct                        

__23.03__________(magnitude)--------- Wrong
Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error.

Explanation / Answer

basketball qstn

comparison; return to 2*(2.65-1.2)*9.8 =v^2; v=5.331 m/s;
return to 0.69m= -0.5g*t^2 +v*t +1.2;
t^2

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