Monday

February 27, 2017
Total # Posts: 892

**Chemistry**

The dosage of technetium-99m for a lung scan is 20 μCi/kg of body weight: Suppose a person absorbed 52mrads of alpha radiation. What would be the dose equivalent in mrems?

*December 6, 2013*

**math**

Write each of the equations below in standard form; that is, without parentheses: a. y = (x – 7)2 – 5 b. y = –3(x + 4)2 +6

*November 13, 2013*

**sociology**

I am writing a concept paper. I am suppose to pick a topic and highlight it from a macro ad micro sociological perspective. I have chosen to focus on public transportation and how the people on a train barely interact with each other. I am good on the micro part of the ...

*October 9, 2013*

**Calculus**

Differentiate y=log(8x^2-3x+9)

*October 8, 2013*

**Calculus**

Differentiate y=log(8x^2-3x+9)

*October 8, 2013*

**Physics/electricity**

The answer is 5.075 ohms

*October 6, 2013*

**science**

A hot air balloon descends from a pressure of 380 mm Hg to 760 mm Hg and at the high altitude has a volume of 1,000 cubic meters. If the temperature starts at 50 degrees C and changes to 25 degrees C, the new volume will be: a. 100.0 x 50 x 760/25 x 380 b. 100.0 x 50 x 25/760 ...

*October 4, 2013*

**Calculus**

Find the area of the region bounded by the graphs of the given equations: y=x, y=2√x

*October 4, 2013*

**Chemistry**

22.05 = 22.1 sig fig

*September 25, 2013*

**Math**

the ratio of 7 more than a number to 2 less than that number is 13/4 find the number

*September 17, 2013*

**Algebra**

you deposit 3500 in an account that pays 4.5% annual interest, compounded monthly. How long will it take for the balance to reach 5000? Use formula A= P[1+(r/n)]^(ny) and use knowledge of logarithms.

*August 7, 2013*

**COMPARISON/CONTRAST ESSAY-Please Proofread**

Heated styling tools can be used to straighten or curl hair. Hair styling over the years have been made easy now that there are so many different styling tools such as curling irons and flat irons. People are always trying to make changes to their hair to have a stylish and ...

*July 27, 2013*

**Science**

Many farmers harvest their crops in the fall and then let the leftover plant material stay on the ground over winter. How does this help prevent erosion?

*June 25, 2013*

**soc320**

Which of the following is among the impediments to government action on health care? (Points : 1) Frequency of divided government and the resulting decentralization of the legislative process Magnitude of disagreement between citizens and the insurance industry Ideological ...

*June 17, 2013*

**Chemistry**

What is the reaction for 2NH4I+Cl2=2NH4Cl+I2

*June 16, 2013*

**physics**

We are doing the force table lab in class and now we are calculating the f equilibran and the equilibrant angle. I had no time graphing a solution and came up with the right answers by measuring, but we are also suppose to do it purely mathematically and I do not know how to. ...

*June 7, 2013*

**Chemistry**

Consider the reaction: 2CO(g) + O2(g) equilibrium 2CO2 (g) Write the equilibrium expression for this reaction. Keq = ?? Addition of a catalyst to this reaction would have what effect on the equilbrium? Addition of a catalyst to this reaction would have what effect on the rate?

*June 2, 2013*

**chemistry**

A 50g sample of ammonium dichromate is decomposed, what is the milliliter volume of nitrogen gas released at STP?

*June 2, 2013*

**math**

20

*May 6, 2013*

**geometry**

syllogism

*April 17, 2013*

**Math**

42 is 7 more than 35 means you can get one more 7 out of 42 than you get out of 35.

*April 17, 2013*

**algebra**

You're welcome.

*April 17, 2013*

**Physics**

A force (in this case, water) is applied to a waterwheel that turns and lifts a small weight that is attached to a string that is attached to the waterwheel's axle. How do Newton's 3 laws of motion describe this event?

*April 5, 2013*

**math**

1/9*8/9=8/18

*April 3, 2013*

**physics**

bob, you fail to understand that the tension force has accelerated the lighter object upwards; when the heavier object hits the floor, the lighter object still has upward velocity. the magnitude of this velocity is determined by the magnitude of the tension force.

*March 31, 2013*

**statistics**

The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. (a)One of the petals is 0.2 cm wider ...

*March 28, 2013*

**Calculus**

a= 7e b= -7

*March 27, 2013*

**Chemistry**

Solid mercury breaks down when heated forming the elements mercury and oxygen. write an equation for this reaction

*March 25, 2013*

**accounting**

On dec. 31, 2010 a corporation issued 200,000 face value 12% bonds that mature 10 years from the date of issue. The issue price was 97. if the firm uses the straight line method of amortization interest expense for 2011 wll be reported at

*March 23, 2013*

**Business Math**

Hafers, an electrical supply co., sold $4200.00 of equipment to Coates Wiring Inc. Coates signed a promissory note 5-12th with 6.00% interest. The due date was Aug. 21st Short of funds Hafers contacted their bank on 7-6th;the bank agreed to take over the note at a 7.20% ...

*March 23, 2013*

**MATH**

Your program has a research and development project scheduled to start in January 2004 which is expected to take 40 months to complete. The project is expected to cost a total of $150 million (then-year dollars), with cost expected to be incurred as follows: A) FY04 $ 20 ...

*March 18, 2013*

**math**

evaluate this exprssion 3X^3+5x-10X^2-10X

*March 15, 2013*

**math**

The tolerance in inches for the diameter of a piston is described by the absolute value inequality |d-5| , or equal to 0.01. What is the desired diameter of the piston? By how much can the actual diamer of the piston vary from the desired diameter?

*March 15, 2013*

**general chemistry**

Calculate the molarity of each of the following solutions. 12.03mg KI in 107.6mL of solution.Express your answer using four significant figures.

*March 7, 2013*

**math**

what is 117.04 in scientific notation

*March 4, 2013*

**physics**

suppose you are driving on a straight two lane road at a constant speed of 88 km/h truck travelling at a constant speed of 104 km/h approaches you.what is the truck's velocity relative to you.

*March 3, 2013*

**SOC203**

ALL BUT ONE of the following effects occurs as a result of warfare: (Points : 1) diminished social programs. mother-child bonding. literacy decline. political restructuring.

*February 24, 2013*

**SOC203**

Which of the following types of income is NOT protected from the low taxation rate of the capital gains tax? (Points : 1) Real estate profits Bonds Salaries Stock investments

*February 10, 2013*

**statistics**

A set of data consists of 90 observations between 350 and 950. a) What rule would you use to find the number of classes? Use this rule to determine the number of classes? b) What formula would you use to determine the class width or length? Use that formula to determine the ...

*February 9, 2013*

**calculus-max & min**

an open box with a square base is to be constructed from 48 square inches of material. What dimensions will produce a box with maximum volume?

*January 31, 2013*

**math**

find the missing number in the pattern? 2,6,18,54, ,486 choices a.152 c.162 b.156 d. 262

*January 10, 2013*

**Math**

This question was answered but not by finding a range? If Jim and Mary jog 12 miles in a week. Is it reasonable that the jog 624 miles in a year. To solve problem need to estimate by finding a range.

*January 7, 2013*

**Math**

This question was answered but not by finding a range? If Jim and Mary jog 12 miles in a week. Is it reasonable that the jog 624 miles in a year. To solve problem need to estimate by finding a range.

*January 7, 2013*

**Math**

Jim and Mary jog 12 miles a week. Is it reasonable to say that the jog 624 miles in a year. Estimate by finding a range.

*January 7, 2013*

**math**

if 40 percent of my grade is at a 97 percent average and 40 percent of my grade is at a 92 percent average and my final test is worth 20 percent of the grade then what do i have to score on my final test to have a grade of 91.5 percent or better?

*December 18, 2012*

**Math**

Which of the following is not a property of logarithms? A. log(A - B) = logA/logB B. logA + logB = logAB C. xloga = loga^x D. log(b) b^x = x

*December 14, 2012*

**Math**

Which of these rational numbers does the Rational Roots Theorem say can't be a solution to 14x7 + 13x5 − 19x4 + 7x2 − 6x − 21 = 0? A. 3/2 B. 2/7 C. -1 D. -(1/2)

*December 14, 2012*

**statistics**

6. Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?

*December 11, 2012*

**algerbra**

Katy has a rectangle field that is 700 feet wide one portion of the field is 2x long the other portion is 14y. Use the distributive property to find an expression for the area of the field.

*December 9, 2012*

**algebra**

5t-10t^2÷5t

*November 23, 2012*

**algebra**

5t-10t^2÷5t

*November 23, 2012*

**Physics**

As a swimmer pulls his arm through the water, various muscles exert forces on the upper arm. The figure below shows a force F exerted on the humerus (upper arm bone) by the pectoral muscle. The muscle is connected to the bone d = 7.00 cm from the center point O of the shoulder...

*November 8, 2012*

**math**

please just say the darn answer

*November 5, 2012*

**Parent**

the perimeter of the triangle is 55 inches. what is the value of X?

*November 1, 2012*

**Physics**

also include the units please. im not sure if i have the right answer because the site tells me my units are wrong, so for all i know i have the right answer but i cant tell

*October 22, 2012*

**Physics**

Compute the angular momentum of the earth arising from the following motions. (a) Earth's orbital motion around the sun. (b) Earth's rotation on its axis.

*October 22, 2012*

**Physics**

Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 7.54 cm from the rotation axis.

*October 21, 2012*

**Physics**

Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.120 kg, initially moves to the right at a speed of 4.90 m/s, while the second block, of mass 0.240 kg, is initially to the left of the first block and moving to the right at 7.40 m/s. ...

*October 18, 2012*

**Physics**

Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.120 kg, initially moves to the right at a speed of 4.90 m/s, while the second block, of mass 0.240 kg, is initially to the left of the first block and moving to the right at 7.40 m/s. ...

*October 18, 2012*

**math**

a social security number contains nine digits such as 074-66-7795. how many different social security numbers can be formed?

*October 4, 2012*

**stats**

1. Find the sample variance and standard deviation 6, 53,11,49,35,26,28,28,31,31 s squared = (round to the nearest hundredth as needed)

*October 2, 2012*

**math**

3B216 + 2B316 =

*September 26, 2012*

**math**

Divide 332 by 2 (base 4)

*September 26, 2012*

**Math**

Thanks Steve

*September 25, 2012*

**Math**

please convert decimal numbers to binary 32.75 10th power

*September 25, 2012*

**economics**

1. Suppose that as the price of Y falls from $3.00 to $1.00 the quantity of Y demanded increases from 10 to 18. Compute the price elasticity of demand. Is the demand elastic or inelastic?

*September 24, 2012*

**Math**

Let p -> q represent the conditional statement All hummingbirds love nectar. This is equivalent to p = If it is a hummingbird and q = then it loves nectar. State your answers to the questions below both in words and in symbols. 1. What is the contrapositive of this ...

*September 17, 2012*

**Math**

Please I am having a hard time with these. Let p be: it is wrong to smoke in public Let q be: secondary cigarette smoke is a health threat Let r be: the American Lung Association says that secondary cigarette smoke is a health threat Can you answer these questions? A. What ...

*September 17, 2012*

**math**

Equivalencies If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa. 2. It ...

*September 12, 2012*

**Math**

Thank you Ms Sue. I was scrolling through the thread and my eyes where bugging out

*September 12, 2012*

**Math**

Is there a way to get an message or I have to scroll through these Maths to find me because I can't find mine

*September 12, 2012*

**math**

If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa. 2. It is not true ...

*September 9, 2012*

**math**

What is the negation for these Original……-> Negation Some are....---->None are Some are not--->All are All are... ---> Some are not None are..---->Some are 1. Some basketball players are tall. 2.All roses are flowers. 3. No dogs are cats. Some ...

*September 9, 2012*

**math**

Can you each make up an example in which "Some A are not B" is true, but the statement "Some B are not A" is false? An example would be "Some dogs are not poodles" is true but "Some poodles are not dogs" is false

*September 9, 2012*

**math**

if the universal set U is defined by U={1,2,3,4,5,6,7,8,9,10}and A={1,2,3,4} B={3,4,5,6,7} what is contained in A n B'=the intersection of A and B'?

*September 9, 2012*

**Statistics**

(TCO A) Consider the following age data, which is the result of selecting a random sample of 20 United Airlines pilots. 47 45 45 52 58 55 58 44 42 38 45 52 48 47 51 45 52 42 37 40 a. Compute the mean, median, mode, and standard deviation, Q1, Q3, Min, Max for the above sample ...

*September 6, 2012*

**math**

Find the x-intercept and y-intercept for y=-5+1

*September 4, 2012*

**Statistics**

A conservative correction method for inflated "Alpha values" based on multiple comparisons being carried out independently on a specific data set, is known as...? A. Ad Hoc Testing B. Tukey's honestly significan differences (HSD) C. Post Hoc testing D. Bonferroni...

*September 2, 2012*

**Statistics**

In conducting multiple regression analyses (MRAs), a major technical concern involves any high correlation of predictor (regressor) variables included in the model. The term for this is ....? A. Redundant predictors B. Close "knit" IVs C. Multicollinearity D. ...

*September 2, 2012*

**Statistics**

Parametric procedures of quantitative analysis make an underlying assumption that...? A. Dichotomous variables have been "smoothed" B. The variables are measured at least at an ordinal level. C. All responses are measured in a mutually exclusive manner D. The ...

*September 2, 2012*

**Statistics**

Analysis of Variance (ANOVA) results in the calculation of the F Statistic and interpretation of this statistics will inform you as to...? A. Which means significantly differ from the others. B. How the variables are associated with each other. C. Whether one or more of the ...

*September 2, 2012*

**Statistics**

To make causal inferences from observed differences between groups based on varied levels of treatment, it is necessary to...? A. Find significant differences between groups at at-least the .05 level B. Use T-test or ANOVA procedures to conduct the analysis C. Have random ...

*September 2, 2012*

**Statistics**

When conducting an inferential statistical analysis, and applying a conventional "critical p-value" of .05, the odds of making a Type I Error and "rejecting a true Null Hypothesis" is? A. 1 in 30 B. 1 in 100 C. 1 in 20 D. 1 in 10

*September 2, 2012*

**statistics**

What would a person's numerical score be if someone scored two Standard Deviations above the Mean on a standardized test where the Mean = 100 and the Standard Deviation =15?

*August 30, 2012*

**statistics**

What formula is used to calculate the Standard Error of Measurement?

*August 30, 2012*

**statistics**

What do independent trials in relationship to probability theory mean?

*August 30, 2012*

**statistics**

A "Set" within quantitative theory represents ...?

*August 30, 2012*

**statistics**

What particular measure of correlation would be most appropriate for use with two variables measured at an ordinal level?

*August 30, 2012*

**math**

what is the correct order of operations for calculations of basic math problems?

*August 30, 2012*

**statistics**

What are the defining characteristics of the Ratio Level of Measurement?

*August 30, 2012*

**chemistry**

how much heat is released wen 10g of steam at 100 degrees c is cooled to 10g of liquid water at 100degrees c?

*August 29, 2012*

**english**

In Great expectations, how is pip different from the convict in chapter l?

*August 19, 2012*

**Algebra2**

Are these right?! Absolute value : 1. |x^2-2x+16|=8 x=-4 x=-3 x=-2 x=2 2.|3x-2|=7 x=5\3 x=3 3. |3x+2|+3=0 x= -5/3

*August 16, 2012*

**math**

Equivalencies?? If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa. 2. It...

*August 10, 2012*

**Financial Planning**

What are the long term and short term effects of credit and debt?

*July 26, 2012*

**Statistics**

n1-25, n2-36, s1 power 2=50, s2 2 power=72, m1=100. m2=105

*July 23, 2012*

**math**

wheels are 1.25 inches in diameter and the fastest speed is 3ft/second maximum distance to travel is 16 x (18cm)

*July 19, 2012*

**maths**

20. Marie can afford a $250 per month car payment. She’s found a 5 year loan at 7% interest. a. How expensive of a car can she afford? b. How much total money will she pay the loan company? c. How much of that money is interest?

*July 18, 2012*

**porpotions**

Carlos goes to a local deli for lunch and orders a sandwich. He needs to choose a bread, a meat, a vegetable, a cheese, and a sauce. How many sandwich combinations are possible? Assume Carlos always picks only one item from each category. Bread: Italian, rye, wheat, white, ...

*July 6, 2012*

**Statistics**

A study was conducted in order to estimate u, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults give a mean weekly computer usage time of 8.5 hours and that from prior studies , the population standard deviation ...

*June 25, 2012*