January 22, 2017

Posts by Roberta

Total # Posts: 42

chemistry assignment
A laboratory instructor gives a sample of amino acids powder to each students,1,2,3and4,and they weigh the samples.The true. value is 8.72g.Their results for three trials are 1:8.72g,8.74g,8.70g 2:8.56g,8.77g,8.83g 3:8.50g,8.48g,8.51g 4:8.41g,8.72g,8.55g.(a)calculate the ...
August 7, 2016

biology assignment
How are cohesion and adhesion properties of water linked to photosynthesis
August 4, 2016

Drug interactions
which drug lessened the effect of warfarin(coumadin)?
April 17, 2015

how do you solve this problem 3 - q = 15
October 11, 2014

a diver dives from the top of a 100m cliff. he begins his dive by jumping up with a velocity of 5m/s how long does it takes for him to hit the water below?
September 11, 2014

In a bag of candy, there are five red candies for every two green candies. If there are 35 total candies in the bag, which of the following is the total number of green candies in the bag? A.5 B. 10 C. 20 D. 25
July 13, 2014

A student uses approximately 40 to 45 gallons of gasoline per month. The cost of gasoline varies between $2.96 and $3.61 per gallon. Which of the following is a reasonable estimate of the student's weekly gasoline expense? A. $15 B.$30 c. $45 D. $50
July 13, 2014

If half of the undecided voters vote for Candidate 1 and the other half vote for Candidate 2, which of the following is the number of votes Candidate 2 will receive? A. 45 B. 63 C. 69 D.0.87
July 13, 2014

. Every member of a high school class of 150 students was polled to see whom they would vote for in the election for student body president. The poll results are shown below. Candidate 1 46% Candidate 2 30% Undecided 24%
July 13, 2014

Every member of a high school class of 150 students was polled to see whom they would vote for in the election for student body president. The poll results are shown below.
July 13, 2014

(4x-3y)2 Simplify the expression above. Which of the following is correct? A. 16x2 + 9y2 B. 16x2-9y2 C. 16x2 -24xy -9y2 D. 16x2 -24xy+9y2
July 13, 2014

(1/2)(10t) =50,000 Solve the equation above for t. Which of the following is correct? A. 250 B. 1,000 C. 2,500 D. 10,000 .
July 13, 2014

Which of the following is the best estimate of the number of centimeters in 1 yard? (Note: 1 yard = 3 feet; 1 foot= 12 inches; 1 inch= 2.54 centimeters) A. 36 B. 72 C. 90 D. 180
July 13, 2014

Two restaurants have rooms to rent for dinner parties. One restaurant charges $100 to rent a room and $20 per person. The other restaurant charges $25 to rent the room and $25 per person. Which of the following is the number of people for which the cost of a dinner party would...
July 13, 2014

A temperature gauge reads 95° F. Which of the following is the correct conversion to degrees Celsius? (Note: ° C = 5/ g[° F -32]) A. 21° C B. 35° C c. 63° c D. 113° C
July 13, 2014

. A rectangle has a perimeter of 24 units. If the width is 4 units, which of the following is the length? A. 6 units B. 8 units C. 10 units D. 16 units
July 13, 2014

2 5/8+ 1/3 Simplify the expression above. Which of the following is correct? A. 7 7/8 B. 1 1/7 C. 7/8 D. 8/63
July 13, 2014

What is the molarity of a solution composed of 2.23 g of potassium iodide (KI) dissolved in enough water to make 0.181 L of solution? Answer in units of M
February 25, 2014

Jean will receive $8,500 per year for the next 15 years from her trust. If a 7% interest rate is applied, what is the current value of the future payments? I get a rounded sum of $200,180.
August 29, 2013

The Harding Co. in its first year earned $39,000 in revenues and received $33,000 cash from customers. They incurred expenses $22,000, but had not paid $2,250 of them at year-end. Harden also prepaid $3,750 cash for expenses to be incurred in the next year. Calculate the first...
May 21, 2013

in the equation 6p+4(70-P)=300. how do i find the value of p ?
February 15, 2012

Criminal Justice
What is an effective presentation in the Criminal Justice System?
May 13, 2011

A helium-neon laser ( λ=633nm) illuminates a single slit and is observed on a screen 1.50m behind the slit. The distance between the first and second minima in the diffraction pattern is 4.75 mm. What is the width (in mm) of the slit?
March 31, 2011

A wizard with a long beard and bright, flaming eyes places a table in front of you. On the table are two circular rings resembling frisbees. The wizard motions to the table. "We call them Galadriel rings after the great elf of Middle Earth, and we use the rings to test ...
March 23, 2011

Pre Calculus
The diameter of a ferris wheel is 250 feet and θ is the central angle formed as Dave travels around the wheel. Dave starts his ride at Point 0, makes 4 complete revolutions and stops at Point 1, 45 degrees from Point 0. If his ride takes 5 minutes, how fast was he going ...
March 7, 2011

What would happen to the chromosome number if there were no meiosis in the formation of gametes? Why cells undergoing mitosis require one set of division but cells undergoing meiosis need two sets of divisions?
October 10, 2010

compare cost control strategies of employer-sponsored health plans
April 28, 2010

If the temperature of a solution goes from 27 degrees celcius to 36 degrees celcius for a 5,0 g sample, how would you determine the energy produced by the reaction?
April 27, 2010

MAT 116 Week 7 quiz
9x+5y=2 -6x+y=16
January 10, 2010

Physical Science
Suppose you want to heat 40 kg of water by 20 C. How many joules of heat are required?
November 14, 2009

Link: theweatherprediction.c0m/habyhints/170/ change c0m to com
March 30, 2009

Google 'how to find wet bulb depression' and click the 7th link. Sorry, you cannot post links here
March 30, 2009

Algebra 2, Grade 10
Factor and solve for when x = 0 Or put it into a graphing calculator. x = {-1.58113883, 1.58113883, -1.732050808, 1.732050808}
March 30, 2009

Sorry about the Subject
March 30, 2009

Help with Translation
Indeed; Please help.
March 30, 2009

Cranberry productions in Mass totaled 1.8 million barrels in 2004, 28% increase from previous year's production. This year's crop avg 127.9 barrels per acre, an increase of over 30 barrels per acre from 2003 crop. But demand increased by even more than supply, actually...
January 30, 2009

visual arts
What are the elements and principles of designs?
September 18, 2008

actually he does have our administrators permission to do this, especially since we have an in-class final where we cannot use any resources or notes. i am not a cheater and i don't want the answers, i just want to know how to get started on these problems, as i have ...
May 16, 2008

Hello! This is my take home final for my chemistry class and I can use any resources to help me solve the questions. Can someone help me get started on all of them? Thanks… (note: he wants us to solve them using stoichiometry) 1. The resting calorie use of a human is ...
May 16, 2008

criminal justice
• Identify the primary and secondary roles of school administrators and teachers concerning school-based crime issues.
March 27, 2008

Childhood Education Question
1.Developing problem solving skills is a product of which approach? conventional,learning,information, or emergent creative 2.A teacher who gives lots of information to her students and asks close-ended questions uses which approach? information,conventional, emergent creative...
January 3, 2007

Social Studies
What are the nine types of landforms? please help! This site is excellent.
November 30, 2006

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