# A colony of bats is counted every two months. The first four counts are 1200, 1800, 2700, and 4050. If this growth rate continues, (4 points) 1. What is the recurrence relation of the bat population? (2 points) 2. How many bats are there at the 12th count? Show all work. (Hint: solve the recurrence relation above)

Friday, October 1st, 2010

### Solution:

1. Recurrence relation
• Note that 1800/1200 = 1.5.
• Next, take 1.5* 1800 =2700, and that is the next population.
• Now 1.5*2700 = 4050.
2. To calculate the number of bats at the 12th count, take 1200 * 1.511 = 1200 *86.5 = 103,797

# N-3/8=6

Tuesday, September 7th, 2010

# What is 9/10 of 80?

Friday, July 23rd, 2010

### Solution:

The expression “9/10 of 80” can be written as

This is equal to 72.

# Simplify : 12 – ( x + 3 ) +10

Monday, July 19th, 2010

### Solution:

You can simply 12 – ( x + 3 ) +10 by rearranging the terms:

1. 12 –x -3 +10
2. 19-x

# What is mean?

Saturday, July 17th, 2010

### Solution:

The arithmetic mean is the average.

http://en.wikipedia.org/wiki/Arithmetic_mean

# I need to figure out 4 to the power of 2 plus 5 to the power of 2

Saturday, July 17th, 2010

42 + 52 =16 + 25 = 41