Mix Bag
Growth or Decay
Rational Exponents
Exponents
Word Problems
Geometric Sequences
100
What is the initial amount and growth factor for the function f(x)=2(3)x
initial amount=2
growth factor= 3
100
How do I know if an exponential function is exponential decay from an equation?
Example: y = 3(0.56)x
Decay is has a b value or growth factor less than 1
100
Convert to exponential form: cube root of a
a^(1/3)
100
x^0
1
100
2243
100
What is a1 and r of the following sequence?
2, 6, 18, 54, ...
a1=2 and r=3
200
Becky invested $19,800 in a CD that pays an annual interest rate of 5.3%. The CD is set to compound daily. How much is in Becky’s account after 9 years? (Note: Ignore the extra day from leap year.)
$31,901.32
200
Do the following equations represent exponential growth, decay, or neither?
a) y=3.5(0.3)x
b) y=2(3)x
c) y=5x+6
a) Decay
b) Growth
c) Neither (It's linear! y=mx+b)
200
Convert to radical form: x^(10/7)
Seventh root of x^10
200
(a^3b^-2c^8)^-2
b^4 / a^6 c^16
200
What will be the cost in 17 years?
$32,313.27
200
Write the explicit formula for this geometric sequence.
-1,-3, -9, -27, ...
-1(3)^(n-1)
300
Find the rate given the coordinates; (0, -2) (3,4)
2
300
f(x)=2(1.13)x
Does this function represent exponential growth or decay? What is the growth/decay RATE?
Exponential Growth
Rate: 0.13 or 13%
300
Simplify fully!
t^(2/5) x t^(1/10)
square root of t
300
(x^5 y^4 / x^-2 y^3)^-3
1/ x^21 y^3
300
16,941 people
300
Find the 7th term of the geometric sequence:
55, 165, 495, 1485, ...
a7=40095
400
a) What is the y-intercept?
b) Is it Growth or Decay?
c) What is the Horizontal Asymptote?
a) (0,1)
b) growth
c) y=0
400
f(x)=5(0.97)x
Does this function represent exponential growth or decay? What is the growth/decay RATE
Exponential Decay
Rate: 0.03 or 3%
400
Simplify fully:
m^(7/8) / m^(2/3)
24th root of m to the 5th
400
(5/2)^-4
16/625
400
Is the function exponential growth or decay? 
Decay
400
Find the 15th term of the geometric sequence.
100, 50, 25, 12.5, ...
a15=0.006
500
Write the equation to the following table:
(hint, simply plug in initial and growth factor)
y= 5(2)x
500
Dr. Higgins purchased a car for 86,400 and every year it decays by 12%. What can he expect the value of his car to be after 3.5 years?
f(x)=26400(.88)3.5=$16,876.92
500
((xy)^2)^1/3 / y
cube root of xy
500
(2xy^-5 / 10x^3 y^8) ^-2
25x^4 y^26
500
If you put $500.00 into an account and the account earns a 3% yearly interest rate. How much will be in the account after 5 years?
Round the nearest cent!
$579.64
500
Find the formula for the following geometric sequence if a4=1296 and a8=1,679,616
an=6 x 6^n-1