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Alg. 2/Trig.
Unit 3 Quiz REVIEW
Name__________________________________
Date___________________________________
1. You have just inherited $150,000. You have to decide whether to put the money in a 4% annual
percentage rate compounded yearly or an 3.8% annual rate compounded quarterly.
How much will each account be worth in 35 years?
Which account will you choose?
2. A radioactive isotope is decaying at a rate of 22% every week. Currently there is 400 grams of the
substance. Write an equation that will represent the number of grams present after n weeks.
a)
How much will be left one day from now?
b)
When will there only be one gram left?
3. An account is earning 1.2% interest, compounded semi-annually, the initial investment of $3000.00 is
put into the account and no withdrawals are made:
a)
Identify the initial value and the multiplier.
b)
Write an equation to find the value of the account V(t).
c)
Find the value of the account in 9 years.
4. Each day Hillary feeds her pet lizard pellets. Three days ago, Hillary had 124 pellets left. Today she
has 91 pellets left.
a) If she feeds her lizard the same number of pellets each day, how many does she feed her lizard
each day?
b)
At this rate, when will she run out of pellets?
c)
If Hillary bought the bag of lizard food 15 days ago, how much was originally in the bag?
5. Sketch a graph with a domain of (-1, 3] and a range of [-4, -2).
6. Investigate y = ¼x
7. Solve the system of equations algebraically. What is the significance of the solution in relation to its
graph?
y = 2x – 6
3x + 2y = -5
8. Write the equation for the given graph.
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