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Tue 4 Apr, 2006 05:34 pm
1. If the intensity of one earthquake is 200 times the intensity of another, determine the difference in their magnitude.
2. 5[(3)^(2x-1)] = 4^(5x+2). Find x
3. Write the simplest polynomial equation with the following information: 2 is a root, 3i is a root, -4 is a double root, and the y-intercept is 10.
4. The population of a colony of cells growing exponetially in culture is 300 after 2 minutes and 1400 after 5 minutes. Find the growth formula for this culture and estimate the population of the colony after 20 minutes.
Homework?
1. The Richter scale is logritmic. An earthquake of magnitude 6 is 10 times more intense (energetic?) than an earthquake of magnitude 5.
2. Use logarithms and exponents to isolate the x factors---then use normal algebraic methods
3. Any polynomial can be expressed as (x+a)(x+b)(x+c)....=y the roots are x=-a, x=-b and so on. Hint complex roots come in pairs and the y intercept occurs when x=0
4> Another exponent rule- use logrithms to find the doubling time of the colony.
Rap
raprap wrote:Homework?
1. The Richter scale is logritmic. An earthquake of magnitude 6 is 10 times more intense (energetic?) than an earthquake of magnitude 5.
2. Use logarithms and exponents to isolate the x factors---then use normal algebraic methods
3. Any polynomial can be expressed as (x+a)(x+b)(x+c)....=y the roots are x=-a, x=-b and so on. Hint complex roots come in pairs and the y intercept occurs when x=0
4> Another exponent rule- use logrithms to find the doubling time of the colony.
Rap
ok for #2, i figured u are suppose to use log, but do you start by multiplying 5 and 3 together? please explain
and then for #1 and #4, is there a formula for this?
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