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Thank you. Believe it or not I was going over geometric sequences today, and I thought that is exactly what the bacteria problem was. THANKS 0313

Thank you, but I have one question. How did you know to multiply 3 to the 6th power by 2. I know 2 is what we start out with, but how did you know to multiply by 2. 0313

This is an exponential growth problem that I used to be able to figure out, but I did not keep notes on it, and in review I am stumped: A colony of bacteria starts with two bacteria at noon. If the number of bacteria triples every thirty minutes, how many bacteria will be present at 3:00pm the...

THANKS, 0313

Problem: The number of bricks in the bottom row of a brick wall is 49. The next row up from the bottom contains 47 bricks, and each subsequent row contains 2 fewer bricks than the row immediately below it. The number of bricks in the top row is 3. If the wall is one brick thick, what is the...

Yes, I understand now. Thank you very much. 0313

I am sorry, but I still don't understand the binomial exansion of the difference of the sums 0313

THANK YOU, and I will use the claret sign from now on. 0313

CLARIFICATION OF THE PREVIOUS ROOT PROBLEM: SOMEONE WROTE EARLIER TO ME: "Twice, we've asked you to type polynomials using math notation and the caret symbol instead of English words." Please type like this: y = ax^2 + bx + c, where b^2 - 4ac = 0 I just read the above note, so I will retype...

Question: If b and c are integers such that the equation 3xsquared + bx + c= 0 has only one real root, which of the following statements must be true? 1. b is even 2. c is odd 3. bsquared is a multiple of 3. The problem is I can only guess at this one. I know that if the equation is equal to...

This problem asks: What is the middle term in the expansion of (x- 1/x)to the sixth power. The first thing I thought of was Pascal's triangle which would make the middle term 20, but the correct answer is negative twenty. I am not sure how to expand this difference of squares, using the...

YES, THANKS 0313

I think they want me to assume that c =h(x) because it is in the h(x) column on the graph I duplicated. Thank you

Jeff- You're right. I erred, the correct equation in the problem is axsquared + bx +c, where bsquared + 4ac= 0. Sorry. 0313

This is a problem that I am not sure about. It is difficult to describe because it involves graphs of parabolas that I will describe as best I can. PROBLEM: Which of the following could be the graph of y=ax +bxsquared + c, where bsquared -4ac=0? 1. Parabola one is negative, turned downward...

I just wanted to make sure I solved this one with the correct reasoning. PROBLEM: First, I was shown some values of the function h, which is defined for all real numbers x. If h is an odd function, what is the value of c? I can't seem to duplicate the table that I was shown, here in html, but...

Look again, Is that because -4 is the only possible solution? 0313

THANK YOU SO MUCH for the help. 0313

Problem: 9x to the 23rd power, minus 7x to the 10th power, minus 2x to the fifth power, plus 1 IS DIVIDED BY X +1. What is the remainder? I know you can solve this through synthetic division, but you must leave zeros as placeholders. There is such a range between the exponents that I end up...

Dear Soroban: THANK YOU SO MUCH! 0313