Stuart pays back two student loans over a 4-yr period. One loan charges the equivalent of 3% simple interest and the other charges the equivalent of 5.5 % simple interest. If the total amount borrowed was $ 24 , 000 and the total amount of interest paid after 4 yr is $ 3280 , find the amount borrowed from each loan.
Stuart pays back two student loans over a 4-yr period. One loan charges the equivalent of 3% simple interest and the other charges the equivalent of 5.5 % simple interest. If the total amount borrowed was $ 24 , 000 and the total amount of interest paid after 4 yr is $ 3280 , find the amount borrowed from each loan.
Solution Summary: The author calculates the amount that Stuart pays back in two student loans over a 4yr period.
Stuart pays back two student loans over a
4-yr
period. One loan charges the equivalent of 3% simple interest and the other charges the equivalent of
5.5
%
simple interest. If the total amount borrowed was
$
24
,
000
and the total amount of interest paid after
4 yr
is
$
3280
,
find the amount borrowed from each loan.
1. Show that the vector field
F(x, y, z)
=
(2x sin ye³)ix² cos yj + (3xe³ +5)k
satisfies the necessary conditions for a conservative vector field, and find a potential function for
F.
1. Newton's Law of Gravitation (an example of an inverse square law) states that the magnitude
of the gravitational force between two objects with masses m and M is
|F|
mMG
|r|2
where r is the distance between the objects, and G is the gravitational constant. Assume that the
object with mass M is located at the origin in R³. Then, the gravitational force field acting on
the object at the point r = (x, y, z) is given by
F(x, y, z) =
mMG
r3
r.
mMG
mMG
Show that the scalar vector field f(x, y, z) =
=
is a potential function for
r
√√x² + y² .
Fi.e. show that F = Vf.
Remark: f is the negative of the physical potential energy, because F = -V(-ƒ).
2. Suppose f(x) = 3x² - 5x. Show all your work for the problems below.
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
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