Sunday

February 14, 2016
Total # Posts: 218

**Bio**

Why were plants helpful in the early development of land? What is the one most important resource plants that moved to land had to develop a means of obtaining?
*January 9, 2016*

**Physics**

1) Design a gear system using 12, 34 and 36 teeth gears that achieve a gear ratio of 13.5:1 and has the top and bottom gear spinning in opposite directions. 2) For a pulley system with 8 supporting strands, how far would you have to pull the rope to lift a 125 kg object 1.0 ...
*January 5, 2016*

**Physics**

For a pulley system with 8 supporting strands, how far would you have to pull the rope to lift a 125 kg object 1.0 meters off the ground? What if the pulley system were only 80% efficient?
*January 5, 2016*

**Science**

1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
*November 7, 2015*

**Social studies**

Against what country was the atomic bomb used? A)Japan B)France C)Europe D)Russia
*October 31, 2015*

**Math 10**

Express as sum or difference of logarithm log of x(3x-5) to the base of 4
*September 9, 2015*

**Math**

what is the lcm of 4,6,18
*August 31, 2015*

**Physics **

A 50 kg ice hockey player standing on a frictionless ice surface throws a ball, mass of 5.0 kg horizontally with a speed of 3.0 m/s. With what speed will the player recoil? • What formula/s should I use?
*August 31, 2015*

**Social Studies**

Thank you
*May 13, 2015*

**Social Studies **

Which description characterizes volcanic islands and not coral atolls? A. Good soil for farming B. Islands are made of tiny skeletons C. Danger of flooding from raising ocean levels D. Sea salt in soil I don't know What was a likely motivation to send colonists to ...
*May 13, 2015*

**math**

Suppose sin x =4/5 , 0<x<pi/2 and cos y = -1/2, pi/2 <y< pi evaluate cos (x-y)
*January 22, 2015*

**chemistry**

may i ask where did the 1.0 g/mL go?
*January 6, 2015*

**Math **

Find all solutions to the equation 3sqrt(3-x)=-3/2. The 3 is the small number outside of the sqrt.
*December 4, 2014*

**math**

350 student in the school, 3 boys for every 2 girls how boys are there?
*September 21, 2014*

**physics**

a bullet is fired horizontally from the top of a cliff that is 30m above a long lake. if the horizontal speed of the bullet is 600 m/s, how far from the bottom of the cliff does the bullet strike the surface of the lake ? with what velocity will the bullet strike the lake'...
*September 13, 2014*

**Geology**

Question: A tectonic plate that is being subducted along much of its boundary tends to move _________ a tectonic plate that is not being subducted. a) slower than b) faster than c) the same rate as d) over
*September 8, 2014*

**Socials urgent**

I need to know the following for these places: Port Moody, Chinatown, Fort Langley (all in british columbia canada) 1. what the area was intially used for (history in late 1800s) 2. what the area is used for today (popular tourist attraction or activites) 3. any brief ...
*June 11, 2014*

**mth-stat-help-plz**

In conducting a hypothesis test for the difference in two population means where the standard deviations are known and the null hypothesis is: o H : uA - uB ≥ 0 What is the p-value assuming that the test statistic has been found to be z = 2.52? A) 0.0059 B) 0....
*December 9, 2013*

**math-true/false**

9.)The actual weight of 2-pound sacks of salted peanuts is found to be normally distributed with a mean equal to 2.04 pounds and a standard deviation of 0.25 pounds. Given this information, the probability of a sack weighing more than 2.40 pounds is 0.4251. **TRUE OR FALSE...
*December 9, 2013*

**math**

Consider the following hypothesis statement using alpha = .05, and data from two independent samples: Ho: µ1 - µ2 = 0 Ha: µ1 - µ2 not equal to 0 X1 = 237, X2 = 218 ¬1 = 54, ¬2 = 63 n1 = 42, n2 = 35 a) Calculate the appropriate test ...
*November 29, 2013*

**MTH- STAT 201**

Can someone please help how to solve this I keep getting the wrong answer so I am now freaking out and clueless 23) The following data show the average retirement ages for a random sample of workers in Boscov’s and a random sample of workers in ShopRite. Boscov’s: ...
*November 29, 2013*

**math-stupid stat**

A manufacturing firm is planning the initial public offering of its stock in order to raise sufficient capital to finance a new plant. With current earnings of $1.61 a share, the firm and its underwriters are contemplating an offering price of $21, or about 13 times earnings. ...
*November 21, 2013*

**MATH-STAT**

Cinemark Theaters knows that a certain hit movie ran an average of 84 days in each city, and the corresponding standard deviation was 10 days. The manager of the southeastern part of Dallas was interested in comparing the movie’s popularity in his region with that in all ...
*November 21, 2013*

**math- stat 201**

I got 1.66667 so we should hire a new consultant?
*November 21, 2013*

**math- stat 201**

A firm hires a pool of financial consultants to discuss portfolio recommendations with its clients. The CEO believes that another financial consultant should be hired if the average phone consultation exceeds 350 seconds. A random sample of 100 phone calls revealed a mean of ...
*November 21, 2013*

**statistics 201**

A firm hires a pool of financial consultants to discuss portfolio recommendations with its clients. The CEO believes that another financial consultant should be hired if the average phone consultation exceeds 350 seconds. A random sample of 100 phone calls revealed a mean of ...
*November 21, 2013*

**History**

Who financed the Middle, the South and the New England colonies?
*October 14, 2013*

**Anatomy**

It consists of a core of titin, forming a strand that continues across the I band to the Z line on that side
*September 25, 2013*

**U.S.History**

How are Primeval and Saga related to U.S. history. Also what does Saga mean?
*September 20, 2013*

**To MS SUE**

Can u please check my math answers
*September 19, 2013*

**Math check my answers**

K thank u
*September 19, 2013*

**Math check my answers**

Square root**
*September 19, 2013*

**Math check my answers**

Please check my answers on the following questions Simplify: (X^6)^1/2 = x^3 1000000^1/6 I don't know this one (64n^12)^-1/6 = 1/0.5n^2 (9n^4)^1/2. = 3n^2 36^3/2 = my answer is 2 in the index of the aware root of 36^3 343^-4/3 I don't know this one Thanks
*September 19, 2013*

**chemistry**

Express the following numbers in scientific notation. (c) 0.9589 (d) 745 (e) 74100 (f) 0.002031
*September 15, 2013*

**chemistry**

A 18.2 g sample of an unknown compound contains 0.7 g of oxygen. What is the percent by mass of oxygen in the compound?
*September 15, 2013*

**math**

find the number of 8 units to the right of -3
*June 15, 2013*

**chemistry - thank you:)**

What volume of H2SO4 0.04 M is required to completely neutralize 200 mL of Al(OH)3 0.02M?
*May 13, 2013*

**CHEMISTRY HELP!!!**

A silver ring is dropped in a solution of Pb(NO3)2 for a certain period. Will you find it intact? Explain.
*May 11, 2013*

**chemistry**

Can a solution of CrCl3 be stored in an aluminum container?
*May 11, 2013*

**algebra 2**

Students at a high school all took the same English test. The scores are approximately normally distributed with a mean of 77 and a standard deviation of 9. If 2500 students took the test, approximately how many scored above 86 or below 68%?
*April 8, 2013*

**algebra 2**

In a high school, 35% of the 3500 students participate in sports. The school board is proposing a participation fee to help with costs. To get student opinion, the school board randomly selects a committee of 6 students to join a discussion of the proposal. That is the ...
*April 8, 2013*

**Albebra 2**

A school wants to determine the average time it takes students to get to school. Every student coming off the bus is surveyed. What is the sampling method used? Does the sample have a bias?
*April 8, 2013*

**algebra 2**

In a cooler there are 8 bottles of grape juice and 12 bottles of orange juice. There are also 6 blueberry yogurts and 9 strawberry yogurts. If you grab a bottle of juice and a yogurt without looking, what is the probability that you get a grape juice and a blueberry yogurt?
*April 8, 2013*

**algebra2**

What are the mean, variance and standard deviation of these values? 62,41,54,60,49,58.
*April 8, 2013*

**Algebra 2**

A teacher is choosing 4 students from a class of 30 to represent the class at a science fair. In how many ways can the teacher choose the students?
*April 8, 2013*

**Algebra 2**

I keep coming up with 1 as the answer and thats not a choice?
*March 13, 2013*

**Algebra 2**

Susan keeps track of the number of tickets sold for each play presented at the community theater. Within how many standard deviations of th mean do all the values fall? 135, 71, 69, 80, 158, 152, 161, 96, 122, 118, 87, 85. 3 4 5 2
*March 13, 2013*

**Algebra 2**

What are the mean, variance, and standard deviation of these values? Round to the nearest 10th. 92, 97, 53, 90, 95, 98
*March 13, 2013*

**algebra**

Simplify 3x(x^2 + 6x - 8)
*March 7, 2013*

**algebra**

Thanks!
*March 7, 2013*

**algebra**

That's just the way the question was asked?
*March 7, 2013*

**algebra**

multiply using FOIL and identify values of a, b, & c. (5x +5)(6x - 8)
*March 7, 2013*

**algebra**

Simplify (uv)0 ______ (u3 v)2
*March 7, 2013*

**Algebra**

Simplify (x^-6)-3
*March 7, 2013*

**Algebra**

Simplify 6x - x^2 (x-3)
*March 7, 2013*

**Algebra**

Simplify (x-7)( x+7)
*March 7, 2013*

**algebra 2**

Can you find the error for me in this equation, find the explicit formula, evaluate the formula for n? I think the error is in the a2-a1 formula.and the -62.50. I know the pattern is 62.50 paid per month. Your uncle loaned you some money and did not charge interest. The amount...
*February 21, 2013*

**algebra 2**

what is the 6th term of the geometric sequence 2000, 800, 320,..../
*February 20, 2013*

**algebra 2**

Your uncle loaned you some money and did not charge interest. The amount you owe him at the end of each of the first 5 months is $937.50, $875.00, $760.00, and $687.00. If the pattern continues, how much will you still owe him at the end of one year?
*February 20, 2013*

**Albebra 2**

Are these correct? a1=(-3x1)2 +4=13 a2=(-3x2)2+4-40 a3=(-3x3)2+4=85 a4=(-3x4)2+4=148 a5=(-3x4)2+4=229 a6=(-3x4)2+4=328 The first six terms of the sequence are 13, 40, 85, 148, 229, 328 I keep coming up with these answers but there is suppose to be an error somewhere.
*February 18, 2013*

**Algebra 2**

What is a recursive definition for the sequence 3, 5, 9, 17, 33..... My answer was adding muliple of numbers, is this correct?
*February 18, 2013*

**Algebra 2**

Got it, thanks!
*February 18, 2013*

**Algebra 2**

What are the first 6 terms of the sequence with the explicit formula an=-3n2+4?
*February 18, 2013*

**Analytic Geometry**

Find the equation of the circle touching the lines x+2y=4, x+2y=2 and y=2x-5 Please I need help, its for my homework
*January 31, 2013*

**Analytic Geometry**

Find the equation of the circle with radius sqrt2 tangent to the line x+y=3 and having its center on the line y=4x
*January 29, 2013*

**Analytic Geometry**

Find the equation of a circle passing through (-1,6) and tangent to the lines x-2y+8=0 and 2x+y+6=0. Please I really need your help. I just do not know what to do.
*January 28, 2013*

**Analytic Geometry**

Find the equation of a circle passing through (3,7) and tangent to the line x-3y+8=0. Please, How do I solve this? Help me
*January 26, 2013*

**Analytic Geometry**

Find the equation of a circle passing through (3,7) and tangent to the line x-3y+8=0. Please, How do I solve this? Help me
*January 26, 2013*

**Analytic Geometry**

Find the equation of a circle passing through (3,7) and tangent to the lines x-3y+8=0 and y=3x. Please Help me solve this. Explain it to me slowly cause I am not really good with this
*January 26, 2013*

**Analytic Geometry**

Are you all using directed distance?
*January 25, 2013*

**Biology**

What is the probability that any two humans with the same parents will be identical(other than identical twins)for each parent's gametes?
*October 17, 2012*

**Language Arts**

What does it mean to write a paper in APA format?
*October 17, 2012*

**chemistry**

Water has a bent molecular shape, but what if water had a linear molecular shape would the molecule be polar or non-polar? Explain This is what I know pls correct me if I'm wrong. It would be nonpolar because it is symmetric so the charge is equally distributed.
*October 5, 2012*

**chemistry**

The formulas for ethane, ethene and ethyne are C2H6, C2H4, and C2H2 respectively. Rank this chemicals 1,2,3 (highest)in terms of strength of IMF and explain the structures of the three molecules. I rank these three based on the bond length so I got C2H2, C2H4, C2H6. I know the...
*October 5, 2012*

**chemistry**

what is the complete ionic equation for the double displacement of CuNO3(aq)+K2S(aq)
*October 4, 2012*

**chemistry**

Why is gas a chemical reaction not detectable by sight? Explain? my answer is because the atoms or molecules of matter in the gaseous state move freely among each other, and are, in most instances, packed more loosely than the molecules of the same substance in the solid or ...
*October 4, 2012*

**Physics**

A man on a 2m high ladder throws a ball in the air with an initial velocity of 22m/s. If the ball is not caught by the man and instead hits the ground, how long was it in the air and how high did it go?
*September 30, 2012*

**arithmetic**

lim x->0 (e^x^2 - 1)/(square root(1+sinx)- square root(cosx))
*September 4, 2012*

**world geography**

c best answer
*May 30, 2012*

**world geography**

c best answer
*May 30, 2012*

**world geography**

The answer is b please read your book carefully
*May 30, 2012*

**Physics**

1.64e12
*May 13, 2012*

**stats**

Test the significance of the correlation coefficient r at a=0.05 for the data below. X values 59, 65, 73, 80, 89 Y values 97, 102, 110, 117, 125 A) Accept p=0 because 60.81<3.18 B) Reject p=0 because 61.13>3.18 C) Accept p=0 because 61.13<2.78 D) Reject p=0 because 60...
*May 7, 2012*

**Statistics**

a random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 50% of the students plan to work, 25% of the students plan to continue in school, and 25% of the students plan to take some time ...
*May 7, 2012*

**statistics**

A random group of customers at a fast food chain were asked whether they preferred hamburgers, chicken sandwiches, or fish sandwiches. The restaurant's marketing department claims that 40% of the customers prefer hamburgers, 46% of the customers prefer chicken sandwiches, ...
*May 7, 2012*

**Statistics**

Test the significance of the correlation coefficient r at a=0.05 for the data below. X values 59, 65, 73, 80, 89 Y values 97, 102, 110, 117, 125 A) Accept p=0 because 60.81<3.18 B) Reject p=0 because 61.13>3.18 C) Accept p=0 because 61.13<2.78 D) Reject p=0 because 60...
*May 7, 2012*

**Statistics**

The table list the sugar content of two types of apples from three different orchards. At a=0.05, test the claim that the sugar content of the apples and the orchard where they were grown are not related. Sugar Content------Orchard 1----- Orchard 2------Orchard 3 Apple type1...
*May 7, 2012*

**Math**

How do I simplify this? :l 4(x+y)]/(5x^2y^3) ÷ (-2x-2y)/10
*April 27, 2012*

**math**

The measure of one angle is 30 degrees less than one-third the measure of its supplement. Find the two angles.
*March 14, 2012*

**math**

The measure of one angle is 15 degrees more than half the measure of its complement. Find the measure of the two angles.
*March 14, 2012*

**math**

The average airspeed of a single-engine aircraft is 150 milesper hour. If the aircraft flew the same distance in two hours with the wind as it flew in 3 hours against the wind, what was the effect of the wind on the plane? What are the equations? What is wind speed?
*March 14, 2012*

**math**

A boat is rowed down a river a distance of 16 miles in 2 hours and it is rowed upstream the same distance in 8 hours. Let r represent the rate of the boat in still water in miles per hour, and let c represent the rate of the stream in miles per hour. Write the equation. What ...
*March 14, 2012*

**math**

The length of a rectangle is 4 times the width. The perimeter is 50cm. Find the length and width. Write the equations. What is the length and width?
*March 14, 2012*

**math**

A rectangle has a length of 4x and a width of 4x-2. Its perimeter is 12 inches. Find the length and width. Write the equations. What is the length and width?
*March 14, 2012*

**math**

Eighty people are separated into 2 groups. The first group is 8 less than 3 times as large as the second. Find the number of people in each group.
*March 14, 2012*

**algebra 2**

The larger of two numbers in 8 times the smaller. The difference between them is 42. Find the numbers. Write the equations. Find the numbers
*March 14, 2012*

**Chemistry**

What compounds can be formed by the reaction of K2SO4 and BaCI2?
*February 27, 2012*

**Precalculus**

1.Solve 5^(2x) -4(5^x)=12 2. Solve Log[8](log[8]x)=0
*January 30, 2012*

**Math**

Verify if this is the correct form please. Given the parent function f(x)=log[10]x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis, a horizontal translation 2 units...
*January 30, 2012*