A ball falls d metres in seconds. d is directly proportional to the square of t. The ball falls 44.1 m in 3 seconds. (a) Find a formula for d in terms of t. y=kx d = k t² k-d = 44.1 32 d = kt² K = 4.9 d=4.9±² 4.9±² 2

A ball falls d metres in seconds. d is directly proportional to the square of t. The ball falls 44.1 m in 3 seconds. (a) Find a formula for d in terms of t. y=kx d = k t² k-d = 44.1 32 d = kt² K = 4.9 d=4.9±² 4.9±² 2

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter3: Polynomial Functions

Section3.5: Mathematical Modeling And Variation

Problem 7ECP: The kinetic energy E of an object varies jointly with the object’s mass m and the square of the...

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Question

A ball falls d metres in seconds.
d is directly proportional to the square of t.
The ball falls 44.1 m in 3 seconds.
(a) Find a formula for d in terms of t.
y=kx
d = k t²
k-d
=
44.1
32
d = kt²
K = 4.9
d=4.9±²
4.9±²
2

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