Blah blah blah blue pie blah blah Aleks blah Chapter 5.
- Rule 72
ex. How long would it take to double your money at 36% interest?
72/36 = 2
- Rational Exponents
ex. x^1/2
= sqrt(x)
Covered two sections without complaining about exams or a bee in my kitchen. I think this went pretty well.
Sunday, February 27, 2011
Mary
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A street that is 222 m long is covered in snow. City workers are using a snowplos to clear the street. A tire on the snowplow has to turn 37 times n traveling the length of the street. What is the diameter of the tire? crazy right?
| Here is the solution, it took me forever to get this module correct! it took me all class! First, we'll find the circumference C of the tire. Then, we'll use C to calculate the diameter d .
We are told that the tire turns
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Lawrence"s blog
this week we pretty much did chapter 12. we did all of the stuff she taught us on aleks so none of it is really new. it was more of a review than anything. All of chapter 12 seems like a review because of aleks wich is a good thing because we get to learn it and understand it and it doesnt seem like greek anymore. chapter 12 is also our exam i think too if i remember correctly. i wont put an examples cuz you can go on aleks and find them or you can look at the one's brob did but if you need help i will be glad to do so
Nathan's blog
So, this week all we did was review the stuff from chapter 5, which was basically an overview of our blue pie in aleks. This stuff was really easy, and this is the only thing the exam is on.
Section 5-2 was on rational exponents.
-The denominator tells you the root. The numerator is the exponent.
Ex. x^3/2= √x^3
In section 5-3, we learned a new formula.
-A(t)=Ao b^t/x
-Ao=starting amount
-b=Doubling, halfing, triplin, etc.
-t=time
-k=how long it takes to get b.
Ex. A bank advertises that if you open a savings account, you can double your money in 12 years. Find out how much money you will have after 7 years, if you invest $1,000.
Ao=1,000 b=2
t=7 k=12
A(t)=1,000(2)^7/12= $1498.31
Rule of 72
72/r%=how long it takes to double.
Ex. How long will it take to double your money at 12% interest?
72/12=6
Chapter 5 is pretty easy, and I should do good on the exam, because I understand most of it due to the fact that it is basically a review of what we've been doing.
Section 5-2 was on rational exponents.
-The denominator tells you the root. The numerator is the exponent.
Ex. x^3/2= √x^3
In section 5-3, we learned a new formula.
-A(t)=Ao b^t/x
-Ao=starting amount
-b=Doubling, halfing, triplin, etc.
-t=time
-k=how long it takes to get b.
Ex. A bank advertises that if you open a savings account, you can double your money in 12 years. Find out how much money you will have after 7 years, if you invest $1,000.
Ao=1,000 b=2
t=7 k=12
A(t)=1,000(2)^7/12= $1498.31
Rule of 72
72/r%=how long it takes to double.
Ex. How long will it take to double your money at 12% interest?
72/12=6
Chapter 5 is pretty easy, and I should do good on the exam, because I understand most of it due to the fact that it is basically a review of what we've been doing.
Nicala's Post
In class this we learned chapter five which basically the same stuff that we have been doing on the blue part of the pie on aleks. We also started working on the gold and purple parts on the pie which are really hard so I did some of the modules in the green part to make the 14 that i need.
One of things that i worked on aleks is was the lines with slope and a point on the line.
Example problem
A line passes through the point (-5,-3) and has a slope of 2. Write an equation of the line.
The form that you use in this problem is y=mx+b. You put the numbers in place of yr variables.You use -5 as yr x and -3 as yr y.
-3=-5(2)+b
-3=-10+b
you move the -10 to other side of the equal sign and it becomes +1o and you add +10 to -3
which gives me +7
7=b
now you put the slope,2, and yr b,2, back in the problem to get yr answer.
y=2x+7
One of things that i worked on aleks is was the lines with slope and a point on the line.
Example problem
A line passes through the point (-5,-3) and has a slope of 2. Write an equation of the line.
The form that you use in this problem is y=mx+b. You put the numbers in place of yr variables.You use -5 as yr x and -3 as yr y.
-3=-5(2)+b
-3=-10+b
you move the -10 to other side of the equal sign and it becomes +1o and you add +10 to -3
which gives me +7
7=b
now you put the slope,2, and yr b,2, back in the problem to get yr answer.
y=2x+7
Friday, February 25, 2011
Taylor's 13th(I think XD) Blog Review
REVIEW TIME!!!!
This is a review on some of my notes from Ch. 13.1.
A sequence is a set of numbers. Today we will learn a bit about arithmetic sequence which is when you add the same number to every term.
This is the formula:
tn= t1 +(n-1)d
d is the number that is being added or subtracted. The n and one by the t are small to.
Ok let's do some examples.
Find the first 5 terms of this equation tn= 8n+4
t1= 8(1)+4 First replace n with 1,2,3, and for and solve the equation.
t2=8(2)+4
t3=8(3)+4
t4=8(4)+4
t1= 12 Then you have your answers.
t2= 20
t3= 28
t4= 36
7,18,29,40.... find the formula for the nth term.
7,18,29,40.... First you need to figure out what is being added or subtracted from
each number. In this case it is adding 11.
tn=t1+(n-1)d Then write out your equation.
tn=7+(n-1)11 Then fill out the parts that you know2.
tn=7+11n-11 Then multiply 5 times n and -1.
tn= -4 + 11n Then you just add up your like terms and this is your answer.
This was the review on some of my notes from Ch. 13.1.
P.s. SOS THERE IS A BEE IN MY HOUSE!!! T-T HELP!! I CAN'T EVEN DO MY HOME WORK!! ALL OF MY STUFF IS IN THE KITCHEN AND IT IS IN THERE TOO!!! T-T
This is a review on some of my notes from Ch. 13.1.
A sequence is a set of numbers. Today we will learn a bit about arithmetic sequence which is when you add the same number to every term.
This is the formula:
tn= t1 +(n-1)d
d is the number that is being added or subtracted. The n and one by the t are small to.
Ok let's do some examples.
Find the first 5 terms of this equation tn= 8n+4
t1= 8(1)+4 First replace n with 1,2,3, and for and solve the equation.
t2=8(2)+4
t3=8(3)+4
t4=8(4)+4
t1= 12 Then you have your answers.
t2= 20
t3= 28
t4= 36
7,18,29,40.... find the formula for the nth term.
7,18,29,40.... First you need to figure out what is being added or subtracted from
each number. In this case it is adding 11.
tn=t1+(n-1)d Then write out your equation.
tn=7+(n-1)11 Then fill out the parts that you know2.
tn=7+11n-11 Then multiply 5 times n and -1.
tn= -4 + 11n Then you just add up your like terms and this is your answer.
This was the review on some of my notes from Ch. 13.1.
P.s. SOS THERE IS A BEE IN MY HOUSE!!! T-T HELP!! I CAN'T EVEN DO MY HOME WORK!! ALL OF MY STUFF IS IN THE KITCHEN AND IT IS IN THERE TOO!!! T-T
Sunday, February 20, 2011
Feroz's Blog
This week we learned more on Chapter 12. Woohoo.
One thing I remember clearly is finding the magnitude.
ex. u = <8,3>
Find [u] <-- That's supposed to be an absolute value sign but my laptop doesn't have them.
sqrt(8^2 + 3^2)
= sqrt(73)
And dot product, that's always fun.
ex. <1,3> x <7,4>
* Multiply across and add.
7 + 12 = 19
One thing I remember clearly is finding the magnitude.
ex. u = <8,3>
Find [u] <-- That's supposed to be an absolute value sign but my laptop doesn't have them.
sqrt(8^2 + 3^2)
= sqrt(73)
And dot product, that's always fun.
ex. <1,3> x <7,4>
* Multiply across and add.
7 + 12 = 19
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