A sled accelerates down a hill and then slows down after it reaches a flat portion of ground. The speed of the sled s ( t ) (in ft/sec) at a time t (in sec) after movement begins can be approximated by: s ( t ) = { 1.5 t f o r 0 ≤ t ≤ 20 30 t − 19 f o r 20 < t ≤ 40 Determine the speed of the sled after 10 sec, 20 sec, 30 sec, and 40 sec. Round to 1 decimal place if necessary.
A sled accelerates down a hill and then slows down after it reaches a flat portion of ground. The speed of the sled s ( t ) (in ft/sec) at a time t (in sec) after movement begins can be approximated by: s ( t ) = { 1.5 t f o r 0 ≤ t ≤ 20 30 t − 19 f o r 20 < t ≤ 40 Determine the speed of the sled after 10 sec, 20 sec, 30 sec, and 40 sec. Round to 1 decimal place if necessary.
Solution Summary: The author evaluates the speed of the sled at various given time intervals from start time using mathematical methodologies.
A sled accelerates down a hill and then slows down after it reaches a flat portion of ground. The speed of the sled s(t) (in ft/sec) at a time t (in sec) after movement begins can be approximated by:
s
(
t
)
=
{
1.5
t
f
o
r
0
≤
t
≤
20
30
t
−
19
f
o
r
20
<
t
≤
40
Determine the speed of the sled after 10 sec, 20 sec, 30 sec, and 40 sec. Round to 1 decimal place if necessary.
I want to learn this topic l dont know anything about it
Solve the linear system of equations attached using Gaussian elimination (not Gauss-Jordan) and back subsitution.
Remember that:
A matrix is in row echelon form if
Any row that consists only of zeros is at the bottom of the matrix.
The first non-zero entry in each other row is 1. This entry is called aleading 1.
The leading 1 of each row, after the first row, lies to the right of the leading 1 of the previous row.
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