Posts by Sylvie
Total # Posts: 27
How much heat is needed to raise the temperature of 5.58 kilograms of iron from 20.0°C to 1000.0°C? Specific heat of iron is 450,000 J/(kg x °C). Type the correct answer to 3 significant digits.
June 14, 2016
Commas: Do I need a comma between the words notes and so? - "Sitting at the sticky, crumb-covered cafeteria table, Luther and Ruth carefully studied their chemistry notes so that Dr. Wilson's next tricky test wouldn't confuse them." Do I need a comma between ...
February 25, 2013
Natalie earns $2.50 for each CD she sells and $3.50 for each DVD she sells. Natalie sold 45 DVDs last year. She earned a total of $780 last year selling CDs and DVDs. Write an equation that can be used to determine the number of CDs (c) Natalie sold last year. How many CDs did...
February 16, 2013
Express the radical as a power. Then evaluate it. Round to the hundredths place. I can't figure out how to type the symbols on my computer, but there are 3 problems. 1) 795 "square-rooted to the 3rd power" 2) 9876 "square-rooted to the 5th power" 3) 845...
February 13, 2013
Show how you substitute the values into the formula, then use your calculator. *Use A = P(1+r/n)nt to find the amount of money in an account after t years, compounded n times per year. *Use I = Prt to find the amount of simple interest earned after t years 1) If a person ...
February 3, 2013
You and your friend live 12 miles apart. You leave home at the same time and travel toward each other. You walk at a rate of 4 mph and your friend bicycles at a rate of 11 mph. A) How long after you leave home will you meet? How far from home will each of you be? B) Suppose ...
August 29, 2012
Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?
December 2, 2010
math - 5th grade
Hello: I am having difficulty witht the following math: Question #1 If the area of a circle is 27 sq. in. What is the radius? I am coming up with an answer of 13.5 sq. in. Is that correct? If not, can you show me step by step how to get the answer? Question #2 If the area of a...
February 20, 2010
The number of boys in a certain class exceed the number of girls by 7. If the number of boys is 5/4 of the number of girls, how many boys are there in the class? The choices of answers are: a) 21 b) 28 c) 35 d) 42 e) 63 I figured out that the answer is 35, but I did it by ...
February 12, 2010
I have to do a project on 4 types of writing. Fictional narrative, Personal narrative, Informational writing and Persuasive writing. The project consists of giving characteristics of each, as well as 2 prompts (examples) for each. This is what I have so far. Please tell me if ...
February 8, 2010
What are two examples of indirect water usage that get a car to start? I know really nothing about car engines, so I don't know what parts of cars use water, or how they use it. Thanks for explaining this.
March 19, 2009
In these two sentences, I'm not sure where to put the apostrophe to make it a plural possessive noun. We were excited to see the (children) photographs. The pictures looked like real (photographer) pictures.
January 20, 2009
In this sentence Plenty of silicon is found on Earth, but it remains a valuable material for the computer industry. I'm still not sure if the simple subject is plenty or silicon, but I think it's silicon because the second part of the sentence says it.
October 28, 2008