# Need some help with math, questions in description

Mariah Lyn 2012/07/03 03:22:17
Related Topics: Games, Car, Hour, e, Stop
1. The distance required for a car to stop is directly proportional to the square of its velocity. If a car can stop in 112.5 meters at 15 kilometers per hour, how many meters are needed to stop at 25 kilometers per hour?
A 250.75
B 298
C 312.5
D 337.50

What is the length of line segment EF if E is at -4,-5, and F is at +5,+2
A square root of 10
B square root of 130
C square root of 34
D fourth root of 34

What is the perimeter of triangle PQR is P is at 0,-5, Q is at -2,3, and R is at 3,-2
A square root of 136
B tenth root of 21
C square root of 5+ square root of 3+ seventeenth root of 2
D eighth root of 2+ square root of 17
You!

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• Leo Gru 2012/07/03 04:14:15
Problem 1: Directly proportional means that if the velocity squared is 100 and the distance is 150 then to find the distance you multiply your ratio (d/(v^2)) by the new velocity squared.
• Gwendolyn Harper 2012/07/03 04:01:43
do you have the square root button on your calculator? (for #1) for the rest, draw the picture using the x, y chart.

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2013/05/19 00:09:40