Evaluate:
Log_2 16
4
Convert to an exponential equation.
log_2 32=5
2^5=32
Convert to a Logarithm of form
2^3=8
log_2 8=3
What is the formula for annual compound interest? What does each variable represent?
A = P(1+r)t
P Initial Investment
r rate as a decimal
t number of years
Solve
4.5x = 100
x = 3.062
Evaluate:
log_27 3
1/3
Convert to an exponential equation.
log_2 x=y
x=2y
Convert to a Logarithm of form
12^3=1728
log_12 1728=3
What is the formula for compound interest for compounding more than once a year? What does each variable represent?
A = P(1+r/n)nt
P Initial Investment
r rate as a decimal
t number of years
n number of times compounded each year
log9(4x) = 2
x = 20.25
Evaluate:
log_4 1
0
Convert to an exponential equation.
log 1=0
10 0= 1
Convert to a Logarithm of form
3^0=1
log_3 1=0
What is the formula for compound interest for compounding continuously? What does each variable represent?
A = Pert
P Initial Investment
r rate as a decimal
t number of years
e = 2.71828..
log3(x+2) = 4
x = 79
Evaluate:
log_5 (1/25)
-2
Convert to an exponential equation.
log_2 (x+3)=8
2^8=x+3
Convert to a Logarithm of form
10^(x+2)=29
log 29=x+2
A man invests $5,000 in an account that pays 8.5% interest per year, compounded quarterly. How much is in the account after 3 years?
$6435.09
3x+4 + 1 = 13
x = -1.738
Evaluate:
log_2 (1/4)
-2
Convert to an exponential equation.
log_7 4=x-6
7^(x-6)=4
Convert to a Logarithm of form
5^3=x-3
log_5 (x-3)=3
A woman invests $6,500 in an account that pays 6% interest per year, compounded continuously. How much is in the account after 2 years?
$7328.73
10(4)-x - 11 = 149
x = - 2