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Calculators

A calculator is a hand-held inexpensive electronic device used to perform the operations of arithmetic. The simplest calculators can only do addition, subtraction, multiplication, and division, while scientific calculators can handle exponential operations, and trigonometric and logarithmic functions.

1,648 Questions

What is full form of ABACUS?

ABACUS is a name of a calculating apparatus - it is not an acronym.

How do you do a cosine regression on a graphic calculator?

I don't believe the graphic calculator has a cosine regression tool, but if you go to STAT, and CALC, there is a sin regression tool. If you hit enter on that then insert your L values, it will come up with a sin regression. The sin regression should be the same as a cosine regression, except that the sin regression should have a different value of C, usually getting rid of the value of C altogether will give you the correct regression.

How do you solve a quadratic equation on a TI-84?

Press MATH. Then go down to the last option, which says "Solver...". Press Enter. If you do not see "eqn:0=" then press the up arrow until you do. Now type your quadratic equation in. It will automatically be set equal to zero. (Use the button to the left of ALPHA for a variable, or use a capital letter as your variable(s). Put the cursor over the value next to the variable you want to solve for. Then press ALPHA and then SOLVE (the ENTER key. Notice that SOLVE is written in green above the ENTER key.) You will get an answer. Type in other values next to the variable to solve for other possible answers. You will normally get the answer closest to the one that is next to the variable before you press solve.

A complete java code to make calculator?

import java.io.*;

import java.util.*;

public class Calculator

{

public static void main(String args[])

{

System.out.println("Make your arithmetic selection from the choices below:\n");

System.out.println(" 1. Addition");

System.out.println(" 2. Subtraction");

System.out.println(" 3. Multiplication");

System.out.println(" 4. Division\n");

System.out.print(" Your choice? ");

Scanner kbReader = new Scanner(System.in);

int choice = kbReader.nextInt();

if((choice<=4) && (choice>0))

{

System.out.print("\nEnter first operand. ");

double op1 = kbReader.nextDouble();

System.out.print("\nEnter second operand.");

double op2 = kbReader.nextDouble();

System.out.println("");

switch (choice)

{

case 1: //addition

System.out.println(op1 + " plus " + op2 + " = " + (op1 + op2) );

break;

case 2: //subtraction

System.out.println(op1 + " minus " + op2 + " = " + (op1 - op2) );

break;

case 3: //multiplication

System.out.println(op1 + " times " + op2 + " = " + (op1 * op2) );

break;

case 4: //division

System.out.println(op1 + " divided by " + op2 + " = " + (op1 / op2) );

}

}

else

{

System.out.println("Please enter a 1, 2, 3, or 4.");

}

}

}

How does a slide rule work?

You set the input number by sliding the center sliding part arrow, to align with a number on the static part. There are many scales along the ruler, where you can pick off the answer by reading across.

State the difference between particular solution and particular integral?

Particular integral is finding what the integral is for example the integral of 2x is x^2 + C. Finding the particular solution would be finding what C equals from the particular integral.

Does a calculator display the exact values of all irrational numbers?

No. An irrational number is one that does not repeat or finish, and a calculator cannot display millions of digits like an irrational number would have.

How do you calculate the work of a spiral spring?

Hi,

I may be wrong and correct me if i am. Work is the force applied over a distance: F x d.

So to calculate the work of a spiral spring it would be the spring coefficient (usually denoted as "k") times the distance. But you have to remember that the spring force is kxd, so you have to integrate the force over the distance, which will yield the following equation: work is equal to 1/2 the spring constant times the distance squared.

W=(1/2) k d2

What is the difference between periodic and aperiodic real-time tasks?

A periodic real-time task is any task where there is a set amount of time allocated to a regularly repeated task whereas an aperiodic task is any task that occurs from a randomly occurring event.

How do you make the asymptotes on a graph of secant appear on a TI-84 plus edition?

Press Window and scroll down to Xres. Change it to 2. Then press GRAPH. If the asymptotes still do not appear, increase the Xres number by one until they do. (It cannot go higher than eight.)

Why is log -10 display an error on the calculator?

In the real numbers, the logarithm is only defined for positive numbers. The logarithm of zero or a negative number is undefined. (For calculators who work with complex number, only the logarithm of zero is undefined.) This follows from the definition of the logarithm, as the solution of:

10x = whatever

"Whatever" is the number of which you want to calculate the logarithm. Since 10x is always positive, that means you can't find an "x" such that the power results in a negative number, or in zero.

The same applies if you use a base other than 10, for example the number e = 2.718...

Where can you find a car valuation calculator online?

You can find a car valuation calculator online at the NADA website or the Kelly Blue Book website. You can also check Edmunds or some of the car dealer sites.

World Math Day cheats?

There are no cheats. You have to do the math yourself.

use a calculator!

How do you use the time-date function on a victor calculator?

This is what I did. Slide the bar from OFF to ITEM. Hit the blue button on the left TIME/DATE, then hit the equals (=) sign to set the date and time. Slide the bar from ITEM to OFF. When I want to print the date on my till tape, I hit TIME/DATE. (Once, prints the date and a second hit prints prints the time.) Hit CE/C to get $0.00 to display and ready to calculate.

How do you remove the backup battery in the TI - 84 calculator?

Push on the battery with your finger so that it compresses downward.

Use a pen to catch the underside of the battery where the rectangular opening extends off of the circular opening that contains the battery.

The battery will surprisingly come right up (if you are me). Pull out the protruding battery and you're set.

How do you find a percentage of an amount without a calculator?

It isn't hard. It's really simple and easy. For example, you want to change 29 into a percentage. One way is this. 29 becomes 29 over 100. 29 over 100 turns into a decimal. You should know decimals. 29 over 100 should be 0.29 hundredths That's how you say the decimal form. 0.29 hundredths becomes 29%. The numerator is the percentage. You really don't need the fraction or decimal. But it helps you understand the procedures.

How do you calculate standard deviation on a Casio fx-115ES calculator?

standard deviation

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP

2.Press 3 for STAT

3. Press 1 for VAR

4.Enter values for X column

5. When done entering press SHIFT 1

6.Press 5

7.Press 2 to calculate the mean

8.Press =

i did not come up with this explanation myself i found it on a website called fixya.com so I'm not taking credit for the answer but it works.