For Exercises 29-48, use a variation model to solve for the unknown value. The amount of simple interest earned in an account varies jointly as the amount of principal invested and the amount of time the money is invested. If $5000 in principal earns $750 in 6 yr, determine how much interest will be earned on $8000 in 4 yr.
For Exercises 29-48, use a variation model to solve for the unknown value. The amount of simple interest earned in an account varies jointly as the amount of principal invested and the amount of time the money is invested. If $5000 in principal earns $750 in 6 yr, determine how much interest will be earned on $8000 in 4 yr.
Solution Summary: The author calculates the amount of interest earned on 8000, based on the sum of principal invested and time invested.
For Exercises 29-48, use a variation model to solve for the unknown value.
The amount of simple interest earned in an account varies jointly as the amount of principal invested and the amount of time the money is invested. If
$5000
in principal earns
$750
in 6 yr, determine how much interest will be earned on
$8000
in 4 yr.
Consider the following system of equations, Ax=b :
x+2y+3z - w = 2
2x4z2w = 3
-x+6y+17z7w = 0
-9x-2y+13z7w = -14
a. Find the solution to the system. Write it as a parametric equation. You can use a
computer to do the row reduction.
b. What is a geometric description of the solution? Explain how you know.
c. Write the solution in vector form?
d. What is the solution to the homogeneous system, Ax=0?
2. Find a matrix A with the following qualities
a. A is 3 x 3.
b. The matrix A is not lower triangular and is not upper triangular.
c. At least one value in each row is not a 1, 2,-1, -2, or 0
d. A is invertible.
Find the exact area inside r=2sin(2\theta ) and outside r=\sqrt(3)
University Calculus: Early Transcendentals (4th Edition)
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