how to find percent notation
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Question:what are these numbers scientific notation
20,000 Now, assume each number for task 1 doubles. Show how each number is multiplied by 2 and find the new numbers. Be sure each number is in scientific notation!
Answers:In scientific notation you write a number with a long string of zeros in a shorthand fashion.
Look at the first non-zero part and rewrite as a number between 1 and 10
56 -> 5.6
Compare where the decimal is now (after the 5) and where it was originally (4 places to the right or positive 4). This tells you the power of 10 to use.
56000 = 5.6x10^4 or 5.6E4 in calculator speak.
The others work the same
70000 = 7.0x10^4 = 7.0E4
20000 = 2.0x10^4 = 2.0E4
What happens if you double a number in scientific notation?
2x(5.6x10^4) = 11.2x10^4, but this breaks the rule about the significant part being between 1 and 10.
11.2 = 1.12x10
11.2x10^4 = 1.12x10x10^4 = 1.12x10^5 or 1.12E5
2x56000 = 112000 = 1.12x10^5 (because the decimal should be 5 to the right from its new location)
2x70000 = 140000 = 1.4x10^5
2x20000 = 40000 = 4.0x10^4 (Notice the power of ten doesn't change here.)
Just in passing...
.00000645 = 6.45x10^-6 = 6.45E-6 because the decimal belongs 6 steps to the left of its new location.
Question:trying to learn about fraction notations and simplify 16.6% plz help
Answers:okay. percents are out of a hundred. thus, 16.6% is the same things as saying 16.6/100.
so that is your fraction.
you can reduce it if you want, by dividing the top and the bottom by 2 (to get 13.3/50).
hope i helped! :-)
Question:The technochip costs $1,990 plus 15% more for the printer.
How much does the technochip cost plus the printer?
how do i find the answer?
Answers:1,990 times .15 (15% of 100) = 298.5
So add your technochip ($1990) and your printer ($298.50)
to get $2288.50
Question:Write each number in standard notation.
8 x 10^6
6) Computations with Scientific Notation
Perform the computations. Write answers in scientific notation.
This problem is in fraction form.
9 x 10^-4
3 x 10^-6
7) Evaluating Polynomials
Evaluate each polynomial as indicated.
-2x^4 3x^2 + 5x 9 for x = 2
8) Addition of Polynomials
Perform the indicated operation
(w^2 2w + 1) + (2w 5 + w^2)
9) Subtraction of Polynomials
Perform the indicated operation.
(4 5y + y^3) (2 3y + y^2)
10) Multiplying Monomials
Find each product.
11) Multiplying Polynomials
Find each product.
(3c^2d d^3 + 1)8cd^2
12) Perform the indicated operation.
(5x 6)(5x 6)
13) The FOIL Method
Use FOIL to find each product for each problem.
(2y 5)(y 2)
(5n^4 1)(n^4 + 3)
14) Multiplying Binomials Quickly
Find each product. Try to write only the answer.
(y 1)(y + 3)(y 4)
15) Product of a Sum and a Difference
Find each product.
(3y^2 + 1)(3y^2 1)
16) Find each product.This entire problem is in ( ) except the ^2. The y is actually between the fraction of 2/3
2y - 1^2
17) Dividing Monomials
Find each quotient. Try to write only the answer.
This is in fraction form.
Also in Fraction form.
8) Dividing a Polynomial by a Binomial
Complete each division and identify the quotient and remainder.
Also in fraction form.
2x^3 + 4
2x Not trying to get someone to do the home work just explain how it is done. I don't want the answers to the problems.
Answers:You've got to be kidding. We're here to help someone understand some sticky point of chemistry, not to do your homework. If you have a specific question about how to do scientific notation, then by all means, ask away. But we're not about to do all of this algebra homework for you.
Percent Yield :Free Science Help at Brightstorm! brightstorm.com How to find percent yield for chemical experiments.
MATH LESSON: Finding a Percent of a Number :www.timbedley.com Concise and clear lesson on how to find a percent of a number. For example, what is 30% of 27?