Sunday

April 19, 2015

April 19, 2015

Number of results: 110,849

**math**

HELP ME!!! One of your friends missed the class on scientific notation. Describe how you would explain to your friend what it means for a number to be in scientific notation and how to convert a number from standard form to scientific notation.
*January 10, 2011 by drew*

**7th grade math - Scientific Notation basics**

1. The area of Greenland is 840,000 square miles. What is this number in scientific notation? 2. What is this number in standard form? 5.75 x 10^9 3. In a recent year the world production of wheat was about 5.2 x 10^8 metric tons. What is this number in standard notation?
*September 27, 2012 by Delilah*

**7th grade math questions Scientific Notation**

19. Write the size of a grain of very fine sand, about 9.35 x 10^-2 cm, in standard form. 31. The population of the US is expected to be 392 million people by 2050. Write this answer in scientific notation. 37. Write 10^29 - 10^28 in scientific notation. Thanks! -Delilah :)
*September 28, 2012 by Delilah*

**Math 11**

Scientific Notation question... It says put it in scientific notation and here is the question. 3100.0 x 10^2 But it's already in scientific notation... and I have no clue what to do... I've never done a question in scientific notation before... can someone please help me?
*September 9, 2007 by Karn*

**math**

turn standard form into scientific notation: 1. 12457.686 m 2. 0.000065423 g 3. 128.90 g 4. 0.0000007532 m turn scientific notation back to standard form: 1. 1.37 x 10^4m 2. 2.875 x 10^2g 3. 8.755 x 10^-5g 4. 7.005 x 10^-3m
*May 21, 2013 by melves*

**Algebra Help!!**

Find an example of scientific notation in real life Explain why the number was written in scientific notation. Create a multiplication problem with scientific notation
*October 4, 2011 by Katie A*

**Algebra 1**

Plz help me with the following problems. Simplify. 5^-1(3^-2) Simplify. mn^-4/p^0q^-2 Write a scientific notation. 0.0042 Write in standard notation. 6.12*10^3 Simplify. Write in scientific notation. 0.5(8 * 10^5) Simplify. Write in scientific notation. (9 * 10^-3)^2 Evaluate ...
*February 5, 2014 by Gabby*

**Math**

Please help with the following questions: 1. write 12 million in scientific notation 2. Write 17,600 in scientific notation 3. write 1.2 * 10 to the fourth power in standard form 4. write 5 * 10 to the sixth power in standard form
*February 4, 2013 by Alex*

**math**

(0.3 x 10^-6)/(3 x 10^-6) those are both in scientific notation, need answer in standard notation. don't know how to do it. :/
*May 2, 2009 by Anonymous*

**Math/Standard and scientific notation**

Express each measure in standard form. (One more thing by the way you need this few prefixes) Tera= 10 to the 12th power Giga= 10 to the 9th power Mega= 10 to the 6th power Kilo= 10 to the 3rd power Pico= 10 to the -12th power Nano= 10 to the -9th power Micro= 10 to the -6th ...
*February 25, 2009 by Sandy*

**math ALG 2!scientific notations helpp**

Write the following value in standard notation. 4.25 x 106 Write the following value in standard notation. 3.89 x 104 Write the following value in standard notation. 3.14 x 10-5 Write the following value in standard notation. 2 x 10-6
*March 15, 2013 by tyneisha*

**math ALG 2!scientific notations helpp**

1.)Write the following value in scientific notation. 23,000,000 2.)Write the following value in scientific notation. 7,400,000 3.)Write the following value in scientific notation. 0.00000021 4.)Write the following value in scientific notation. 0.00003165 5.)Which value below ...
*March 15, 2013 by tyneisha*

**math ALG 2!scientific notations helpp**

Write the following value in scientific notation. 23,000,000 Write the following value in scientific notation. 7,400,000 Write the following value in scientific notation. 0.00000021 Write the following value in scientific notation. 0.00003165 Which value below is not ...
*March 15, 2013 by tyneisha*

**scientific notations **

Explain how to convert seven point one three times ten to the eleventh from scientific notation to standard form, then give the answer in standard form.
*January 18, 2012 by none ya *

**Math**

Describe and correct the error in writing the number 81,700,000 in scientific notation. Standard form 81,700,000 product form 81.7*100,000 scientific notation 81.7*10
*October 3, 2010 by Anonymous*

**7th grade math**

1. The area of Greenland is 840,000 square miles. What is this number in scientific notation? (1 point) 840 x 105 84 x 10–5 8.4 x 105 8.4 x 10–5 2. What answer represents this number in scientific notation? 0.00000916 (1 point) 916 x 10–8 9.16 x 10–6 916 x 108 9.16 x 106 3. ...
*September 26, 2012 by Delilah*

**Maths;Check Answers Please :P**

1. Simplify. 5^–1(3^–2) My answer: 1/45 3. Write in scientific notation. 0.0042 My answer: 4.2 X 10^-3 4. Write in standard notation. 6.12 × 10^3 my answer: 6,120 5. Simplify. Write in scientific notation. 0.5(8 × 10^5) My answer: 4 x 10^5 6. Simplify. Write in scientific ...
*January 17, 2014 by Electro*

**8th Grade Math**

Question: a) Write in standard notation: 6.3 X 10 to the ninth power. b) Write in scientific notation: 0.00000047
*December 8, 2011 by ...*

**math**

Operations with scientific notation Perform the indicated operation. Each final answer must be written in scientific notation. 1. (2.34*10^5)*(-4*10^-8) 2. (4*10^3)*(4.5*10^-3) 3. (5*10^5)*(4.3*10^2)
*January 17, 2008 by shay*

**Math PLZ HELP**

1. Which of the following expressions is written in scientific notation? 1. 73.4 x 105 2. 0.09 × 107 3. 80 x 103 4. 4.22 x 10–3 2. Which of the following is 0.0000000708 written in scientific notation? 1. 7.08 x 10–8 2. 7.8 x 10–8 3. 708 x 10–10 4. 70.08 x 10–9 3. Which ...
*January 31, 2013 by SAMHAM*

**math**

1. Which of the following expressions is written in scientific notation? 1. 73.4 x 105 2. 0.09 × 107 3. 80 x 103 4. 4.22 x 10–3 2. Which of the following is 0.0000000708 written in scientific notation? 1. 7.08 x 10–8 2. 7.8 x 10–8 3. 708 x 10–10 4. 70.08 x 10–9 3. Which ...
*January 31, 2013 by ruby*

**math**

6.4 x 10^11 + 2.85 x 10^11 ( finding the sum written in scientific notation?) - 9.25 x 10^11 (my answer) - 9.25 x 10^22 - 92.5 x 10^-10 - 92.5 x 10^12 3 x 10^20/ 4 x 10^5 (write in scientific notation) - 7.5 x 10^3 - 0.75 x 10^4 (my answer) - 7.5 x 10^14 - 7.5 x 10^15 (6.2 x ...
*September 5, 2014 by Anonymous*

**PHYSICS**

Express following measurements in scientific notation. 1. a) 5800 m I don't even get what scientific notation is. In my book its ays, that in Scientific notation, the numerical part of a measurement is expressed as a number between 1 and 10 multiplied by a whole-number power ...
*September 8, 2011 by Anonymous*

**Math**

Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. 6.2 • 107 / 4.15 • 103
*March 1, 2011 by Jackster*

**simple math**

If a= 9990.9 and b= 9886.1. First, convert these to scientific notation. If only three significant digits are allowed in decimal portion (mantisa) of the scientific notation and chopping and not rounding is used, what is a-b?
*September 14, 2013 by sara*

**scientific notation am i doing it right?**

write in decimal form (standard notation) 1) 8x10^4 = 80000. 2) 9.82x10^5 = 98,200,000. 3) 9x10^-3 = 0.0009 4) 7.24x10^-6 = 0.00000724
*May 25, 2013 by anonymous*

**Math**

Evaluate. Express each result in scientific and standard notation. (5.62 x 10^-3) (16 x 10^-5) and 9.2 x 10^3 2.3 x 10^5
*June 30, 2011 by Danny*

**Math**

Hi everyone! I am extremely struggling with this questions and was hoping someone would go over them with me. Thank you! 1. Which of the following expressions is written in scientific notation? a. 73.4 x 10^5 b. 0.09 × 10^7 c. 80 x 10^3 d. 4.22 x 10^–3 2. Which of the ...
*January 29, 2015 by Tia*

**7th grade math standard form scientific notation**

In standard form: 5. 3.2 x 10^3 7. 4.1 x 10^8 9. Write the average weight of a blue whale, 2.6 x 10^5, in standard form. 15. 2.5 x 10^-3 17. 1.05 x 10^-2 19. Write the size of a grain of very fine sand, about 9.35 x 10^-3 cm, in standard form. Can somebody help? I have been ...
*September 28, 2012 by Delilah*

**7th grade math check my answers please quick**

11. 17, 200 written in scientific notation is 1.7 x 10^5 21. 0.00105 written in scientific notation is 1.05 x 10^-3 are these correct?
*September 28, 2012 by Delilah*

**math**

So, I have to turn the quotient answer into scientific notation.. (answer has to be in scientific notation) 6x10^24/ 8x10^8 - 7.5 x 10^2 - 7.5 x 10^15 - 0.75 x 10^3 *This is the one I pick* - 0.75 x 10^16
*September 3, 2014 by Anonymous*

**math**

1. the speed of light is 8.0x^8m/s in standard form that is? 2. the average size of a virus is 2x 10^-10 nanometers in diameter. how to write the number(s) given scientific notation in standard form. thank you
*May 20, 2013 by melves*

**Algebra**

Write in standard notation. 6.12 X 10^3. A. 6120 B. 612 C. 61,200 D. 61.2 A Simplify and write in scientific notation. 0.5(8 X 10^5). A. 8 X 5^5 B. 4 X 5^5 C. 8 X 10^5 D. 4 X 10^5 D
*January 27, 2014 by Anonymous*

**Scientific Notation**

I got all of them so far EXCEPT this one... help? Thank you! Convert the following into scientific notation: 1/137
*January 23, 2013 by Carl*

**scientific notation**

Express in scientific notation. Choose the answer with the proper number of significant figures. _____ 0.47 x 10-17 0.5 x 10-17 5 x 10-18
*October 17, 2014 by isaac clarke*

**Scientific Notation**

I'm having some trouble solving this problem: 32x10^2 / (4x10^2)^3 Is it possible to have a negative value in scientific notation?
*October 10, 2011 by Maria*

**BA**

use scientific notation to divide the two numbers, express answer using scientific notation, retain at least 3 decimal place for (8.4.10^6)/(5.97.10^2)
*February 24, 2012 by Dechols*

**scientific notation am i doing it right?**

write in scientific notation 1) 400,000 = 4x10^5 2) 5412= 5.412x10^3 3) 0.00056= 5.6x10^-4 4) 0.0000814= 8.14x10^-5
*May 25, 2013 by anonymous*

**Scientific notation**

Express in scientific notation. Remember, M must be a number 1 ≤ M < 10. 32,400 = 3.24-4 3.24*10-4 3.2400*10-4 the dash means to the 4th power
*October 17, 2014 by isaac clarke*

**Math**

Why does a calculator express some numbers in scientific notation rather then in standard form?
*September 16, 2008 by Anonymous*

**Algrebra 1**

What are the practical uses of scientific notation? Why is scientific notation so important in modern-day society?
*June 26, 2012 by Liz*

**math((PLEASE HELP!))**

If two numbers are written in scientific notation. how can you tell which number is greater? Where on a number line does the value of a positive number in scientific notation with a negative exponent lie?
*November 27, 2012 by Maryam :)*

**Intermediate Algebra**

Use scientific notation to divide the following 2 numbers .Express the answer using scientific notation; retain at least3 decimal places (9.4*10^6)/(4.97*10^2)
*March 27, 2012 by sherry*

**Math**

Is 10.512 * 10^3 written in proper scientific notation? If not rewrite the number in proper scientific notation.
*November 14, 2013 by Alan*

**algebra**

use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places. (8.1*10^8)*(4.2*10^3)
*July 9, 2011 by sharron*

**Algebra**

Use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places (1.9 • 10^4) • (8.4 • 10^5)
*January 2, 2012 by yolanda*

**algebra**

Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. (6.2 · 10^7) / (4.15 · 10^3)
*January 29, 2012 by jackie*

**Math**

Asking to describe & correct the error in writing the number 81,700,000 in sci. notation. Standard Form 81,700,00 Product Form 81.7 x 100,000 Scientific notation 81.7 x 10^5
*October 7, 2009 by Hunter*

**math **

Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter your answer with the correct number of significant figures. 885.75 g + 10.151 g - 25.50 g Calculate the value of the following in exponential ...
*September 23, 2010 by help?*

**intermediate algebra**

use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places (8.4*10^6)/ (5.97*10^2)
*July 9, 2011 by swirl*

**scientific notation**

Express 2,750,389 in scientific notation I think it is 2.750389 x 10 6
*October 9, 2007 by john*

**math**

translate the fact below from scientific notation to standard notation: A. 1.07 times 10 to the eighth power B. 7.07 times 10 to the second power C. 2.4 times 10 to the negative three power
*May 22, 2012 by alandra*

**math**

. what are the steps to solve this problem? 0.000027/0.000009 requirements: explain how to use scientific notation to solve the problem describe how to divide written in scientific notation give your final answer in simplest form.
*November 12, 2014 by math help asap*

**7th grade scientific notation help Ms. Sue **

Write each number in scientific notation. 1. 4,800 2. 17, 200 3. 180,000 4. 343, 502 12. 0.00581 13. 0.00105 14. 0.0000078 15. 0.000027 16. 0.000000132 17. 0.000000009
*September 28, 2012 by Delilah*

**algebra**

can you help me with the Lesson 9: Operations and Applications of Scientific Notation Connections Education 1205070 M/J PRE-ALG - T1 Unit 2: Rational Numbers test.What is the product of (5.1*10^3)*(3.2*10^3)? (please express your answer in scientific notation.)
*September 25, 2014 by jasmine*

**Math! Please Check My Awnser!**

Hello! I need some help with math! I have tried to do this but I am unsure about my answers. My I will identify my answers with a "<--". Also, if I have missed one, please tell me the right answer! Also, Thanks for your help in advance! Have a nice day! 1. Which of the ...
*January 14, 2014 by Electro*

**Math**

1. What are the steps to solve this problem? 0.000027 ÷ 0.000009 Requirements: • Explain how to use scientific notation to solve the problem. • Describe how to divide numbers written in scientific notation. • Give you final answer in simplest form. (5 points) Steve please help
*November 14, 2013 by anonymous*

**Scientific Notation - PLEASSEE**

A rectangular yard had a length of 0.006 kilometer and a width of 5x10^-3 kilometers. A. Use scientific notation to express the ares of the yard in kilometers, showing each step in the process. B. Convert the area into square meters using the conversion below. 1 sq. kilometer...
*November 20, 2013 by andra *

**Math**

1. What are the steps to solve this problem? 0.000027 ÷ 0.000009 • Explain how to use scientific notation to solve the problem. • Describe how to divide numbers written in scientific notation. • Give you final answer in simplest form. (5 points) I really need help with this ...
*November 13, 2013 by anonymous*

**Scientific Notation**

Just started learning about the scientific notation, and its actually quite easy, but I dont know why im still struggling with it. For example it says express the following measurements in scientific notation: 5800m The answer is 5.8 * 10^3 What confuses me is that how do you ...
*September 9, 2011 by Anonymous*

**scientific notation**

how can i put 10010 into a scientific notation We want the first digit from the left followed by a decimal then some power of 10 Here it's 1.001 x 10^?? How many decimals did we move to the left?
*September 12, 2006 by alejandra*

**Scientific notation. PLZ HELP!**

Express in scientific notation. Choose the answer with the proper number of significant figures. (3 x 104) (4 x 1023) = _____ 1227 12 x 1027 10 x 1027 1 x 1028
*October 17, 2014 by isaac clarke*

**Algebra 1**

Evaluate. Express each result in scientific and standard notation. (4 x 10^2)(15 x 10^-6)
*June 26, 2011 by Isabella*

**Algebra 1**

Evaluate. Express each result in scientific and standard notation. (4 x 10^2)(15 x 10^-6)
*June 26, 2011 by Bella*

**Alegbra **

write 16.3 million in standard and scientific notation form ?
*December 1, 2011 by chelsea *

**Algebra **

In January sales were 2.08 million. Write the sales for January in standard notation and scientific notation. please help
*November 30, 2011 by chelsea brown*

**scientific notation**

Write the number in scientific notation: 0.000375
*November 20, 2007 by Tabby*

**8th grade**

Is -7*10^11 in scientific notation? If not, write it in scientific notation.
*April 28, 2010 by Logan*

**scientific notation**

simplify write in scientific notation (9x10^-3)^2
*September 15, 2011 by edna*

**scientific notation**

simplify write in scientific notation (9x10^-3)^2
*September 15, 2011 by edna*

**Scientific notation**

Express in scientific notation. Choose the answer with the proper number of significant figures. 69,000,000,000 = _____ 69 x 109 6.9 x 1010 6.910 It has to be A, but I'm not exactly sure.
*October 17, 2014 by isaac clarke*

**Math**

(7.66 • 10^2)(6.29 • 10^-4) answer then convert to scientific notation. the answer I keep getting is 0.481814 the scientific notation I get from this is 4.81814*10^5 but i keep getting it wrong. Can someone please help me.
*June 16, 2010 by Becky*

**math/pre-algebra**

how do u change 0.015 from standard form to scientific notation [ please dont charge me money im only 11 yrs old trynna get help with my homework ]
*November 6, 2010 by Daneeka*

**science**

How to write 5,800 million metric tons in standard form and in scientific notation?
*December 7, 2010 by Robert*

**science**

How to write 5,800 million metric tons in standard form and in scientific notation?
*December 7, 2010 by Robert*

**scientific notation**

Express the answer in scientific notation to two decimals unless requested otherwise. A company produced 2,600,000 small appliances in one year and made a profit of $6,690,000. What was the profit on each appliance?
*March 20, 2009 by brad*

**Homework help plz( Steve or Reiny)**

Determine if the number is written in scientific notation. If not, explain 32 * 10^4. (1 point) No; it is not written as a power of 10. No; the first factor is not a number between 1 and 10. Yes; the number is written in scientific notation. Determine if the number is written ...
*February 20, 2014 by Gabby*

**Algebra 1 (Scientific Notation)**

How will you write this in scientific notation? if you do not mind explaining how you did it. Thank you! $15,789,000,000,000
*June 28, 2012 by *Please Help**

**Math Scientific Notation**

write the scientific notation 1) for 25,000,000 i got: 2.5 x 10^7 2) 4,562,000,000 i got: 4.562 x 10^9 3) 1,250 x 10^5 im stuck on this one i think its: 1.25 x 10 ^ 8 are these right?
*December 19, 2011 by marko *

**Alegbra**

The distance from the Earth to the sun is 93,000,000 miles? Write this number in scientific notation. A scientist measures a speck of sand as having a diameter of 0.00000034? Write this number in scientific notation.
*March 12, 2014 by WillyB*

**math**

A compressed high resolution chest xray image requires about 8MB of data. most GP surgeries are connected to the NHS network at a speed of 100Mbps. how long would it take to download a set of 6 images. give your answer to second to 2 decimal places using scientific notation. ...
*April 27, 2010 by Peter*

**Math**

Suppose it takes 3 days for a space vehicle to travel from the earth to the moon. About how long would it take the same vehicle traveling at the same speed to Venus? Moon= 240,000mi Venus=26,000,000mi Round to the nearest whole number. Use scientific notation. I know it is 325...
*May 13, 2011 by Bkp*

**math...please help asap**

Solve the following; use proper fractions in your answer: 1. 1/3 + 1/4 = 7/12 2. 4/5-2/3 = 2/15 3. 5/6 * 4/5 = 2/3 4. 3/7 divided by 6/8 = 4/7 5. 3 1/4 - 1 3/8 = 1 7/8.....is this a proper fraction? 6. 5 8/9 + 2 4/7 = 8 29/63..is this a proper fraction? Reduce the following: 7...
*August 18, 2006 by anonymous*

**7th grade Math quick help Ms. Sue**

Can you check to see if tese are right? 1. What is 0.68 written as a simplified fraction? 68/100 17/25 100/68 34/25 2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza...
*October 3, 2012 by Delilah*

**MATH**

a. Write the scientific notation b. Write the result in ordinary decimal notation. can you do this one so i know how to do the others (2.9 x 10^3)(3.0 x 10^-3)
*November 9, 2011 by Adam*

**math**

how would i write this in scientific notation 14,718? how would i write this in standard notation 1.98 x 10 to the second power 14,718 could be rewritten as 1.4718*10^4, which is read as "1.4718 times 10 to the fourth power." (The asterisk is often used as the multiplcation ...
*June 13, 2007 by darneta*

**MATH **

0.001=10^___ 1 billion=10^___ 1/10 = 10^___ 13^5 in standard notation 10^9 in standard notation please hellp me answer tese questions
*October 17, 2011 by maryam*

**algebra 1**

write in scientific notation and standard form. (1.9x10 to the second power)times (4.7x10 to the 6th power) how do you do this?
*March 20, 2013 by Anonymous*

**PLEASE HELP ME!!!! I AM IN TEARS!!!**

What is 0.5 million in scientific notation? 2 thousandths, 1095 millionths? What is 194 times 10 to the third power written in scientific notation??? .5 million is 5 ^10^6 2 thousandth is 2*10^-3 1095 millionths= 1.095*10^3*10^-6 =1.095*10^-3
*February 1, 2007 by Sarah*

**Scientific notation**

what is .020833333 in scientific notation?
*March 29, 2008 by Jon*

**scientific notation**

what is 90,000 in scientific notation
*January 10, 2010 by summer*

**Math**

In 2002 Home depos saes amounted to 58200000000. In 2006, its sales were 90800000000. a. Write Home Depo's 2002 sales and 2006 sales in scientific notation. b. What was the percent growth in Home Depo's sales from 200 to 2006? Do all work by using scientific notation.
*October 5, 2009 by Rmz*

**Hard Math :(**

2. What answer represents this number in scientific notation? 0.00000916 a. 916 x 10^-8 b. 9.16 x 10^-6 c. 916 x 10^8 d. 9.16 x 10^6 3. What is this number in standard form? 6.8 x 10^-4 a. 5,750,000,000 b. 575,000,000,000 c. 0.00000000575 d. 0.575000000000 5. What is this ...
*September 10, 2012 by Dude*

**math**

2. What answer represents this number in scientific notation? 0.00000916 a. 916 x 10^-8 b. 9.16 x 10^-6 c. 916 x 10^8 d. 9.16 x 10^6 3. What is this number in standard form? 6.8 x 10^-4 a. 5,750,000,000 b. 575,000,000,000 c. 0.00000000575 d. 0.575000000000 5. What is this ...
*September 10, 2012 by chase*

**math**

2. What answer represents this number in scientific notation? 0.00000916 a. 916 x 10^-8 b. 9.16 x 10^-6 c. 916 x 10^8 d. 9.16 x 10^6 3. What is this number in standard form? 6.8 x 10^-4 a. 5,750,000,000 b. 575,000,000,000 c. 0.00000000575 d. 0.575000000000 5. What is this ...
*September 10, 2012 by chase*

**Algebra **

Can you please check my work? You have helped other students I know. Thank you:) Multiply -7(2a2 -4) = -14a2 + 28 Multiply 0.5(a + b -5) = 0.5a + 0.5b - 2.5 Factor bx - by + bz = b(x - y + z) Combine like terms (simplify) 12x + 4 - 11y - 6x - 9 - y = 6x - 12y - 5 Evaluate the ...
*November 8, 2011 by Sharon (ms. Sue)*

**mth174**

A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not enter your answer in ...
*February 7, 2012 by Alex*

**Calculus 2**

A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not enter your answer in ...
*June 22, 2013 by Liz*

**Algebra (check my answers)**

Please check these answers. Multiply -7(2a2 -4) = -14a2 + 28 Multiply 0.5(a + b -5) = 0.5a + 0.5b - 2.5 Factor bx - by + bz = b(x - y + z) Combine like terms (simplify) 12x + 4 - 11y - 6x - 9 - y = 6x - 12y - 5 Evaluate the expression 3x2y when x = 3 and y = 5 Answer: 135 ...
*November 8, 2011 by Sharon*

**chemersty**

Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter your answer with the correct number of significant figures. 885.75 g + 10.151 g - 25.50 g
*September 10, 2011 by ellen*