Post on 30-Dec-2015
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Notes Over 7 – 7 Solve for the indicated variable.
ba 75 .1
5 5
a5
7b
77a5 7b
a
Notes Over 7 – 7 Solve for the indicated variable.
wlP 22 .2
22
w2
2lP
l2 l2lP 2 w2
w
Notes Over 7 – 7 Solve for the indicated variable.
prtI .3rtrt
prt
I
p
Notes Over 7 – 7 Solve for the indicated variable.
lwA .4ll
wl
A
w
Notes Over 7 – 7 Solve for the indicated variable.
j
kh .5 jj
k hj
k
Notes Over 7 – 7 Solve for the indicated variable.
83
.6 x
y 33
y3 x
x3
2424 24243 y x
243 yx
Notes Over 7 – 7 Solve for the indicated variable.
rC 2 .7 22
r2
C
r
Pg 367 7 – 7 #1 – 5, 6 – 15 Solve for the indicated variable.
36 .1 ca
66
c6
3a
3 33a c6
c
Pg 367 7 – 7 #1 – 5, 6 – 15 Solve for the indicated variable.
j
hg .2 jj
h gj
j
gg
jg
h
Pg 367 7 – 7 #1 – 5, 6 – 15 Solve for the indicated variable.
xyz .3yy
xy
z
x
Pg 367 7 – 7 #1 – 5, 6 – 15 Solve for the indicated variable.
82 .4 sr
22
s2
8r
8 88r s2
s
Pg 367 7 – 7 #1 – 5, 6 – 15 Solve for the indicated variable.
nm 5 3
2 .5 33
m2 15
m 3
n31515
m2 153 n2 2m
2
153 n
Notes Over 7 – 8
1. Suppose you deposit $1000 in a savings account that earns 6% per year. Find the interest earned in two years.
timerateprincipalI
I 260
1000
Simple Interest FormulaI = prt = (principal) (rate) (time)
.060 2
120 120$Find the total of the principal plus interest..
interestprincipal Total 1000 120 1120 120,1$
Notes Over 7 – 8
2. Complete the table. $400, 5%, for 4 years
Simple Interest FormulaI = prt = (principal) (rate) (time)
Principle at Beginning of year
Interest Balance
Year 1: $400
Year 2:
Year 3:
Year 4:
400 05. 20 420
420 05. 21 441
441 05. 22 463
463 05. 23 486
Notes Over 7 – 8
The same thing can be found by using the compound interest formula:
Simple Interest Formula
trpB 1400B 05.01 4
405.1400B
20.486B
Notes Over 7 – 8
3. Find the balance compounded semiannually. Deposit: $900, Int. Rate: 2%, Time: 3 years
Simple Interest Formula
tn
n
rpB
1
900B
02.01
32
601.1900B
37.955B
2
1. $200, 7%, 2 years
timerateprincipalI
I 214
200
Find the simple interest.
.070 2
28 28$
Pg 372 7 – 8 #1 – 6, 8 – 18
2. $870, 6%, 9 months
timerateprincipalI
I 078 .060 /129
15.39 15.39$
3. $495, 8%, 2 years - annuallyFind the balance.
Pg 372 7 – 8 #1 – 6, 8 – 18
trpB 1495B 08.01 2
208.1495B
37.577B
4. $1,280, 13%, 3 years - annuallyFind the balance.
Pg 372 7 – 8 #1 – 6, 8 – 18
trpB 11280B 13.01 3
313.11280B
91.1846B
5. $2,000, 5%, 2 years - semiannuallyFind the balance.
Pg 372 7 – 8 #1 – 6, 8 – 18
tn
n
rpB
1
000,2B
05.01
22
4025.1000,2B
63.207,2B
2
6. $15,600, 10%, 3 years - semiannuallyFind the balance.
Pg 372 7 – 8 #1 – 6, 8 – 18
tn
n
rpB
1
600,15B
10.01
32
605.1600,15B
49.905,20B
2
Pg 372 7 – 8 #1 – 6, 8 – 18
Pg 367 7 – 7 #1 – 5, 6 – 15