Questions Asked on
December 19, 2013

science
2. Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. List and briefly outline the six different periods into which the Paleozoic era is divided. so i cannot find it in
asked by vanessa 
science
Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.
asked by vanessa 
Geography
I need help on this!!! Which event had the greatest impact on the culture of south America? A. the immigration of laborers from asia B. the completion of the panama canal C. the rise of Marxist revolutionaries D. the arrival of Spanish conquerors Is it D?
asked by Anonymous 
Not sure what subject
im not sure 38. In terms of a PowerPoint presentation really being three or more separate presentation, which of the following does not apply? a. the words out of your mouth b. the paper handouts you give your audience members after your presentation is
asked by Kraziekatt99 
math
During last week's visit to this same pear tree, Pete ate 3 times as many pears as Tweet, and Tweet ate 5 fewer pears than Honk. If together the boys ate 25 pears, how many pears did Honk eat during last week's visit?
asked by Anonymous 
Chemistry
If 1.50 g of H2C2O4 2H2O were heated to drive off the water of hydration, how much anhydrous H2C2O4 would remain? Thank you! Please explain clearly.
asked by Jane 
*th Grade Language Arts Ms. Sue Help
simple, compound, complex, or compoundcomplex? 1. Yes, I have a bad case of the flu, and because I need to get well soon, I won’t think about returning to school just yet. compound 2. Because they have been preserved well over time, many ancient scrolls
asked by Kraziekatt99 
algebra
simplify the expression 5+i/2i
asked by helen 
Physics AP
A conical pendulum is formed by attaching a 50 g mass to a 1.2m string. The mass swings around a circle of radius 25cm. A claculate the speed of the mass. B Calculate the acceleration of the mass. C calculate the tension in the string
asked by Robert 
Geography
What was one direct result of the Columbian exchange? A. Europeans began to use horses to plow fields B. American Indians built large urban centers C. American Indians adopted European artistic techniques D. Europeans spread diseases to American indians
asked by Anonymous 
Statistics
Which of the following will increase the power of a statistical test? a. Change ƒÑ from .05 to .01. b. Change from a onetailed test to a twotailed test. c. Change the sample size from n = 100 to n = 25. d. None of the other options will increase power.
asked by Lyndyc 
History
Can someone help me with these 2 questions please? thanks!! :) 1. Why did President Madison veto a bill that supported government funding of internal improvements? (1 point) The Second Bank of the United States did not have enough money to pay for the
asked by Kasey 
Debate?
so here are a few Qs im not sure of 38. In terms of a PowerPoint presentation really being three or more separate presentation, which of the following does not apply? a. the words out of your mouth b. the paper handouts you give your audience members after
asked by bigurl1.4 
Stats
Suppose the following data are selected randomly from a population of normally distributed values. 42 51 43 48 41 57 54 39 45 48 45 39 46 Construct a 95% confidence interval to estimate the population mean. Round the intermediate values to 2 decimal
asked by Tyler 
Algebra 1 (Reiny or Kuai)
Can a solution of a linear inequality lie on a dashed boundary line? Explain.
asked by Anonymous 
biology
After a family picnic, Ella dumped the ice and rock salt from the ice cream maker in the back yard. That area of yard now contains dead, brown grass. Explain why this happened, and use the words hypotonic, hypertonic, and plasmolysis in your explanation
asked by anonymous 
geometry
In a triangle MNO with altitude NP with MP of 15 and NP of 9 what is the length of PO? MNO creates a right angle!
asked by Blake 
algebra
simplify the number using the imaginary unit i. square root of 16
asked by helen 
Statistics
When is there a risk of a Type II error? a. whenever H0 is rejected b. whenever H1 is rejected c. whenever the decision is "fail to reject H0" d. The risk of a Type II error is independent of the decision from a hypothesis test.
asked by Lyndyc 
CALCULUS  Check my answers :)
I'd appreciate corrections for the ones I get wrong. :) Thanks! 1. Determine which of the following is true for the function f(x) = x^3 +5x^2  8x +3. I. f(x) has a relative minimum at x = 2/3. II. f(x) has a relative maximum at x = 2/3. III. f(x) has a
asked by Samantha 
SP180Assignment 6_06 and7_07
a. Why banning the use of cell phones while driving should be mandatory nationwide b. What I see as the biggest challenges young adults face today can someone help me write these two assignment? ppls
asked by HK 
Calc help  check rest of answers, please?
4. Find the tangent line approximation, L(x), of f(x)=x^2/3 at x = 8. L(x) = 4/3x20/3 L(x) = 2/3x+8 L(x) = 4(x8) L(x) = 1/3x + 4/3 *L(x) = 4/3x  8/3 5. A balloon is rising at a constant speed of 5 ft/sec. A boy is cycling along a straight road at a
asked by Samantha 
math
A triangle has vertices with coordinates (2, 0), (3, 1), and (2, 5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image.
asked by james 
math
A twodigit number is chosen at random.What is the probability that the chosen number is a multiple of 7 ? please answer and explain
asked by peter 
Finance
Damon Enterprises' stock is currently selling for $25.00 per share. The stock's dividend is projected to increase at a constant rate of 7% per year. The required rate of return on the stock, rs, is 10%. What is Damon's expected price 4 years from today?
asked by Anonymous 
chemistry
what is the percentage yield for Sr(NO3)2 + Na2SO4 > SrSO4 + 2 NaNO3. mass of strontium nitrate is 0.788g mass of sodium sulfate is 1.258g mass of dry filter paper 0.759 g mass of dried precipitate in filter paper 1.317g
asked by Dianna 
lang arts 8th
Label the sentence below as active or passive. Random people were visited by pollsters. a. active b. passive
asked by bigurl1.4 
chemistry
The human eye responds to a light stimulus (generates a sensation of "light") upon receiving light energy of 10eV (and more). If we take 6000 angstroms as the average wavelength, how many photons must the eye receive to register a light sensation?
asked by Peter 
Math
ABC is an isosceles triangle. If AB =AC =16, BC=8. D is the midpoint of side AC , and G is the centroid of triangle ABC , find BD .
asked by Lwint 
Advanced Functions/ Precalculus Log
1. Evaluate 4^(log base4 64) + 10^(log100) 2. Write 1+log(base2)x^3 as a single logarithm 3. Write log(base b)√(x^3 y z^6) 4. Solve log(base 2)xlog(base 2)6=log(base 2)5+2log(base 2)3 5. Solve 3^(2x) = 9(81^x) 6. Solve 3^(2x)=7^(3x1). Round answer to
asked by Jessie 
math
Arturo Muina is the captain of a charter fishing boat. He is paid salary of 140 per day He also averages tips amounting to 12% of 475 daily charter rate. Last month during a fishing tournament, Arturo worked 22 days. What were his total gross earnings for
asked by Jessica 
Geography help
which identifies one culture factor that unites the people of Latin America? A. they are citizens of the same country B. most are roman catholic c. most speak English and Arabic D. they were once ruled by the same powerful emperor
asked by Anonymous 
Physics
A automobile travels at a speed of northward along a street, and a 7000N sports car travels at a speed of eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the velocity
asked by Bryan 
Geography help
How does the sahara desert influence migration patterns in Africa? I seriously need help on this! thank you! :)
asked by Anonymous 
math
A triangle has vertices with coordinates (2, 0), (3, 1), and (2, 5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image.
asked by james 
Finanace HELP!
Below is what I have available to solve current assets. I would like to solve how much cash is available to the company as well. How much cash does the company have? If the current liabilities are $2,575, what are the current assets? • Net worth $17800
asked by Bree 
Check a few more CALC questions, please?
I feel pretty good on my answers. Are there any I got wrong? Thank you for the help! 1. If g(x) = tan (5x^2), then g′(x) = * 10x sec2(5x2) sec2(5x2) –10xsec(5x2)tan(5x2) 10sec2(5x2) 7xsec2(5x2) 2. The inflection point of the curve y = x4 − 8x3 + 24x2
asked by Samantha 
Physics hard problem
A 14000 N automobile travels at a speed of 40 km/h northward along a street, and a 7000 N sports car travels at a speed of 62 km/h eastward along an intersecting street.(a) If neither driver brakes and the cars collide at the intersection and lock bumpers,
asked by Bryan 
Chemistry
You are operating an Xray tube with a molybdenum (Mo) target by applying an acceleration potential of 50 keV. Calculate the values of two characteristic wavelengths, λKα and λSWL. Express your answers in meters.
asked by Menes 
Math
Question 11 of 20 5.0 Points The percentage analysis of changes of corresponding items in comparative financial statements is referred to as horizontal analysis. A. True B. Fals A
asked by Angela 
MATHS
Stacey spent 1/ 6 of her money on a purse and 7/12 more money on a bag than on the purse. What fraction of her money did she spend?
asked by LARA 
Science (Balanced/Unbalanced Forces)
"Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance.
asked by Alexandra 
Finance
Now that you have a full time job you are ready to start investing for retirement. Your corporation will match 50 cents of each dollar that you put in your 401K account up to the first $7,000. You have altogether $15,000 that you can afford to save this
asked by Heather 
chemistry
The particle wavelength of your lecturer in 3.091 on his way from the office to 10250 (200 yards, 1 yard = 0.9144 m) has been determined to be 4.045 x 10 36m. Taking his body weight to be 178 lbs (1 lb = 0.4536 kg), how long does it take him to get to
asked by Peter 
Biology
***I read the textbook assignment and I have read all the information on the lesson, however I cannot find the answer to this question. Nor can I find anything written about it anywhere in the lesson. Please help a girl out.*** True or False? There are
asked by Erin 
Physics 11 Forces Unit
I'm not sure if my answers are correct. Your help will be greatly appreciated. Thanks in advanced! 1. two very large cruise ships each have a mass of 415000 tonnes. If they were docked side by side, 1.0m apart, their centres would be 60m apart. What is the
asked by Jessie 
physics
If an oxygen atom is 16 times more massive than an hydrogen atom, how much more massive is the "amount" of oxygen separated from any amount of water than the "amount" of hydrogen?
asked by Anonymous 
math
the perimeter p of a rectangle can be found using the formula p=2(l+w) where l represents the length and w represents the width. which equation represents the width in the terms of p and l. a) w=2(pl) b)w=pl/2 c) w=2p1 d) w=p/21 p=2l+2w p2l/2=w
asked by B8 
algebra help
how can direct variation be easily identified on a table equation on a graph?
asked by cv 
physics
1. Calculate the de Broglie wavelength in picometers (1 picometer =10^−12 meters) of an electron that has kinetic energy of 10 keV. The mass of an electron is 9.11 x 10^−31 kg 2. Winter is coming, so I want to make a 1500 W heating coil which will plug
asked by Joshua Pams 
Calculus
what is the limit n to infinite of cos1*cos(1/2)*cos(1/4)*cos(1/8)*cos(1/16)*...*cos(1/2^n)
asked by CHRIS 
Health (Ms. Sue)
Describe the relationship between the HIVantibody test and being HIV positive. A: The HIVantibody test and being HIV positive correspond with each other as HIV positive is one of the results of the HIVantibody test?
asked by Anonymous 
8th Grade Language Arts Ms. Sue Help
Select whether the sentence below is a simple, compound, complex or compoundcomplex sentence However, when David came to conquer the city with his army, he discovered that the Jebusites got their drinking water from a spring just outside the city walls.
asked by Kraziekatt99 
math
Fran Molley is married, claims five withholding allowances, and earned 3,500 gross per month in edition to federal income tax, social security, and Medicare withholding , Fran pay 2.1% state income tax, and 1/2% for state disability insurance ( both based
asked by Jessica 
math
a. Solve a  9 = 20 b. Solve b  9 > 20 c. How is solving the equation in part a similar to solving the inequality in part b? d. How are the solutions different?
asked by victoria 
biology
Gene cloning can involve inserting genes into A. machines. B. humans. C. plants. D. protein. this is not D, and i don't think it's A. if i had to guess, i'd pick C but i'm unsure if it could be B as well.
asked by orpheus 
Accounting
A firm has $200,000 in total assets and $120,000 in owner's equity. What are the total liabilities? A. $80,000 B. $200,000 C. $320,000 D. Cannot be determined from the information given A
asked by Angela 
Accounting
Please use the following information to answer questions 45: Cash $10,000 Accounts Payable $7,000 Accounts Receivable $6,400 Mortgage Payable $65,000 Supplies $1,500 Longterm Debt $36,000 Building $150,000 Notes Payable $9,000 Equipment $80,000 Preferred
asked by Angela 
Science (Help, please!)
"Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance.
asked by Alexandra 
Catering and Business
The planned effort to present a unique image through newspapers, community events, and other visible places is called A. press release. B. public relations. C. branding. D. advertising.
asked by Ruru 
math
find the slope of the linethat passes through the given points (4,6) and (4,4)
asked by ann 
Geography
what would be an example of a formal region? A. the DFW metroplex B. the united states C. the Midwest D. the Mississippi river
asked by Anonymous 
abnormal behavior
1. Some criteria used for reaching a diagnosis cannot be observed directly 2. Personality disorders can be similar to each other. 3. People with different personalities can be given the same diagnosis 4. Do you think that personality disorders are true
asked by Ron 
Math
1575x=1350x I combine like terms first 75x50x?
asked by Jerald 
cal
Evaluate the integral. ∫ 28e^(√7x)/(2√x) dx
asked by tom 
Science
How do you do a double conversions and metric measurements? 32km/hr > m/s Like how do you convert that?
asked by Emma 
math
When James drove to a concert last night, it took him 3 hours and 30 minutes. He averaged 60 miles an hour on the way there. How far did he drive one way?
asked by lulu 
Math
Please use the following information to answer questions 45: Cash $10,000 Accounts Payable $7,000 Accounts Receivable $6,400 Mortgage Payable $65,000 Supplies $1,500 Longterm Debt $36,000 Building $150,000 Notes Payable $9,000 Equipment $80,000 Preferred
asked by Angela 
Accounting
A firm's __________ account is categorized as a current asset. A. equipment B. accounts payable C. bonds payable D. merchandise inventory D
asked by Angela 
Accounting
The percentage analysis of changes of corresponding items in comparative financial statements is referred to as horizontal analysis. A. True B. Fals A
asked by Angela 
engineering
In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O > H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential
asked by Timothy Boons 
Science
A persistent organic pollutant is estimated to have a halflife of 30y. If 3 tonnes of the chemical exists in a polluted area today, how much of the chemical will remain after 120y.
asked by Lily 
ag
which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress
asked by adrian 
Science
Design an experiment to determine what level of a new synthetic insect killer called Beegone is lethal to geraniums.
asked by Lily 
Science
Explain how an increase in agricultural activity might affect a local fishery.
asked by Lily 
Coordinates in 3D, Polar Coordinates, Precalculus
Let a and b be real numbers. Describe the graph of r = a cos (theta + b) as much as possible. (The intent of this question is to get as specific a description as possible that holds for all possible values of a and b.) How would I proceed on this problem?
asked by Cambridge 
math
If #(w,x,y,z)means you square the product of all the terms, for all positive value of w,x,y, and z and #(1,2,3,z)=144, then z = ? please explain how to do that
asked by peter 
math
If #(w,x,y,z)means you raise w,x,and y to the power of z and then take the sum of the resulting values ande # (8,10,11,z)=3,then for all positive values of z, then z=? please explain how to do that
asked by peter 
math
If # (a,b,c,d) means you take the positive value of the square root of each term, then add the resulting values, and # (a,36,16,9)=15, then a = ? please explain
asked by peter 
math
1. x + 8 40 3. 8x > 64 a) x < 8 b) x > 8 c) x 72
asked by victoria 
math (Reiny)
If # (a,b,c,d)means you raise b,c and d to the power of a and then take the sum of the resulting values, and # (2,3,4,d)=89,then d=? 2^a + 3^a + 4^a = 89 1^a + 1^a + 1^a = 89 3^a = 89 a = 86 an I do it right
asked by peter 
Algebra 1
5x2y=4 3x+y=9
asked by Shadae 
PreCalc
Prove: 2  sec^x / 1+ tan ^x = cos 2x
asked by Jack 
math
If #(a,b,c,d)means you subtract the sum of the terms from zero, and # (4,8,11,d)=14, then d= answer and explain
asked by peter 
Math
What is the principal square root of the square of a number?
asked by Krystina 
science sybiotic relationships
What is a commensalism relationship for a Baltimore Checkerspot Butterfly? Please help by 7:00
asked by lollipops 
algebra
last month joe biked 11times as many miles as lee together they biked a total 156miles how many miles did joe bike last month
asked by Anonymous 
cal
Find the derivative of y with respect to x,t, or theta, as appropriate. y = ∫ ^(√4x) ^basedown√x (ln(t^2)) dt
asked by tom 
Geometry.
prove that the distance between any two points inside triangle abc is not greater than half the perimeter of triangle abc my teacher said to try doing this proof by contradiction. can someone please help??
asked by Sammy 
4th grade math
it takes jupiter 12 years to orbit the sun. how many days does it take jupiter to orbit the sun?. add 3 days for leap years
asked by mythreyee 
Geometry.
can you imply something if you are given that two altitudes intersect in a triangle?
asked by Sammy 
math
Find the value of df^1/dx at x=f(a). f(x)=5x+8, a=1 i got 5?
asked by jai 
algebra help
how can direct variation be easily identified on a table equation on a graph?
asked by cv 
Geography
what would be an example of a formal region? A. the DFW metroplex B. the united states C. the Midwest D. the Mississippi river So would this be B?
asked by Anonymous 
Geography
Beijing, china is a huge industrial and population center. because of this its what is a major problem? A. transportation B. discrimination C. pollution D. Migration Is it c?
asked by Anonymous 
math
tion 1 of 20 5.0 Points A firm's __________ account is categorized as a current asset. A. equipment B. accounts payable C. bonds payable D. merchandise inventory D
asked by Angela 
Math
__________ accounts show the amount of money owed to the firm by customers. A. Supply B. Prepaid C. Receivables D. Payables C
asked by Angela 
Math
A firm has $200,000 in total assets and $120,000 in owner's equity. What are the total liabilities? A. $80,000 B. $200,000 C. $320,000 D. Cannot be determined from the information given A
asked by Angela 
Math
Given a net income of $90,000, what is the return on investment for 2000? A. 7.9% B. 22.22% C. 22.78% D. 24.8% C
asked by Angela 
Math
The ratio of __________ to __________ is an example of a __________ ratio. A. quick assets; current liabilities; leverage B. cost of goods sold; total assets; asset utilization C. net credit sales; average owner's equity; leverage D. net income after
asked by Angela 
Accounting
__________ accounts show the amount of money owed to the firm by customers. A. Supply B. Prepaid C. Receivables D. Payables C
asked by Angela 
Accounting
Given a net income of $90,000, what is the return on investment for 2000? A. 7.9% B. 22.22% C. 22.78% D. 24.8% C
asked by Angela 
Accounting
The ratio of __________ to __________ is an example of a __________ ratio. A. quick assets; current liabilities; leverage B. cost of goods sold; total assets; asset utilization C. net credit sales; average owner's equity; leverage D. net income after
asked by Angela 
algebra 2
if a system of equations has no solution then it is what?
asked by betty 
Algebra 2 9th/11th grade math
Expand each binomial. (L2t)^2
asked by Lyss 
statistics
For these 90 times the mean was 15.60 minutes and the standard deviation s=1.80 minutes. Find the margin of error (round to 2 decimal places) and the 95% confidence interval for Julia’s average running time.
asked by sue 
math
54 divi 106
asked by tara 
physics
If a solid is stretched or compressed beyond the point that it can return to its original shape it has passed its
asked by Anonymous 
Dog training
4.Which of the following is notconsidered to be a natural, or inherited, ability? A.Nose C.Search B.Pointing D.Delivery to hand 5.Typically, what is the generally recognized maximum distance for a retrieve? A.100 feet C.100 yards B.250 feet D.200 yards
asked by Steve