To: Grade 7 & Grade 8 Algebra 1 students
From: Mrs. Constantinidou
Date: 3/7/17
RE: Homework
DUE: 3/9/17 (7C,7E,7A& 8C) , 3/10/17 (7D,7B & 8A/8B)
ALGEBRA 1 Instruction Coach Book:
Lesson 18 (pages 134-143). Read the examples and do problems 1-11.
------------------------------------------------------------------------------------------------------------------------------REVIEW FOR TEST NEXT CLASS
Graph each exponential function.
1.
f (x) = 3x
4.
An investment of $8000 in a certain Certificate of Deposit (CD) doubles
in value every seven years. The function that models the growth of this
investment is f (x) = 8000 • 2x, where x is the number of doubling periods.
If the investor does not withdraw any money from this CD, how much money
will be available for withdrawal after 28 years?
5.
A population of amoebas in a petri dish will triple in size every 20 minutes. At
the start of an experiment the population is 800. The function y = 800 • 3x,
where x is the number of 20 minute periods, models the population growth.
How many amoebas are in the petri dish after 3 hours?
2.
y = 0.25x
3.
y = 8 • 1.2x
Use the given function to find the balance in each account after the given
period.
6. $3000 principal earning 4% compounded monthly, after 6 years
(Hint: Use the compound interest formula)
See me during RECESS if you have questions.
Thank you!