Homework Help: Math

Posted by Emme on Monday, January 21, 2013 at 9:45pm.

The algebraic relation d= 0.0056s2 +0.14s models the relation between a vehicle's stopping distance d, in metres and its speed s, in km/h.

a) What is the fastest you could drive and still be able to stop within 80m?
b) What is the stopping distance for a car traveling at 120 km/h?

Math - PsyDAG, Tuesday, January 22, 2013 at 5:22pm
Online "^" is used to indicate and exponent, e.g., x^2 = x squared. I assume only the s value is squared.

a. 80 = 0.0056(s^2) +0.14s

b. d= 0.0056(120^2) +0.14(120)

Solve for the unknown.

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