Question about The Learning Company Achieve! Math & Science Grades 1-3 (381933) for PC, Mac

# Mathematical Calculation Good Day, My mathematical problem is as follows: Say I need to calculate the amount to invest on 6 companies to get a profit of say \$300-00 plus the amount I invested on all 6 companies. As per the table pasted below, I need a formula to calculate the invest amount for each company so that I will always have a profit of \$300-00. Hint: Only 1 company gives a return and the rest you loose. Hint 2: I tried to calculate the Lowest Common multiple to resolve this but it does not always work. Please assist. Company Return RateInvestment AmountTarget Profit \$ A5.4?300 B8.9?300 C11.1?300 D6.7?300 E4.3?300 F7.1?300 Jowi South Africa [email protected]

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Following formula we can use.

S=P(1+RT)
WHERE S =INVEST AMOUNT+PROFIT
P=INVEST AMOUNT
R= RATE OF RETURN
T=TIME IN YEARS

EX : (300+x) = x(1+(5.4/100)*1)
(300+x)*100 = 105.4x
x=30000/5.4
x=5555. 4

Posted on Feb 19, 2008

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Fixed deposit calculations can be done by both manual and automatic methods.Now let us figure out the fd calculation in both ways:
1.) Manual Calculation Technique: It is the conventional process to know your Fixed deposit interest calculation. The formula for manual fd calculation is used as below:

Where,A = Final Amount
P = Principal Amount (initial investment)
r = Annual Nominal Interest Rate (as a decimal, not in percentage)
n = Number of times the interest is compounded per year
t = Number of years

2.) Online Calculator Technique: Nowadays online FD calculator is very amazing technique and it is a very useful online tool that helps you to easily calculate your Fixed deposit return. Online FD calculators uses simple technique in which you need to put your amount, tenure, interest rate and can get accurate results instantly. You can easily calculate and compare the interest receivable by changing the deposit amount.

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### If a house is 1400 square ft. How many linear ft does that convert to?

if the area is 1400 square feet the lineal is 149.6 ft outside edge from a square 37.4 feet on a side, to 2802 ft outside edge from a rectangle 1400 by 1 foot wide. After that the calculation is the number calculated by the formula below multiplied by two plus the length of the ends. The narrower the strip, of course, the longer the linear distance until you have an infinite length line of infinitesimal width and you have created a perfect mathematical construct of two dimensions
The calculation for determining the lineal distance that the internal area can be converted to is:
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Impedance is the opposition of a circuit to alternating current. It's measured in ohms. To calculate impedance, you must know the value of all resistors and the impedance of all inductors and capacitors, which offer varying amounts of opposition to the current depending on how the current is changing. You can calculate impedance using a simple mathematical formula.

1. Impedance Z = R or XLor XC(if only one is present)
2. Impedance in series only Z = ?(R2 + X2) (if both R and one type of X are present)
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### How to do matrix problems in fx991ms

The following was written for the Casio FX-991 ES. If matrix calculations are available on your calculator you will perform them as described below. ( I have no time to verify that the FX-991ms can perform matrix calculations).

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matricies, at the end.)

First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
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[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
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[8:Trn] The transpose of a matrix already defined

To subtract MatA-MatB
To multiply MatAxMatB
To raise a matrixe to a power 2 [x2], cube [x3]
To obtain inverse of MatA already defined MatA[x-1] [x-1] is the x to the power -1 key
Dimensions of matrices involved in operations must match.
Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrice by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

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### How to multiply the matrices using fx-991ms calculator

The following was written for the Casio FX-991 ES. If matrix calculations are available on your calculator you will perform them as described below. ( I have no time to verify that the FX-991ms can perform matrix calculations).

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matricies, at the end.)

First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

To subtract MatA-MatB
To multiply MatAxMatB
To raise a matrixe to a power 2 [x2], cube [x3]
To obtain inverse of MatA already defined MatA[x-1] [x-1] is the x to the power -1 key
Dimensions of matrices involved in operations must match.
Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrice by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

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See the following links for Online Conversion Calculators:

http://www.metric-conversions.org/weight/kilograms-to-pounds.htm

http://www.metric-conversions.org/weight/pounds-to-kilograms.htm

Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information at the website indicated.

Good luck.

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Hello,
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You did not actually ask about how to cure the problem, but here it is.

1.Calculation exceeds calculation range.
2.Calculation outside the input range of a function
3. Illogical operation (division by 0)
4. Poor precision is Sigma calculations (stats)
For all the above check input values.

5. Poor precision in differential calculation results (derivatives:decrease the delta, the step)
6. Poor precision in integral calculation results ( integrals: Change the tolerance tol)
7.Cannot find results in equation calculations (Check coefficients of equations

Take your pick of the above:Only you know what you were doing before the error condition arose.
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