Posts by LEA

Total # Posts: 237

math
Data? (x,y) for the total number? (in thousands) of? college-bound students who took a test in the year x are approximately ?(11,1177), ?(8,1493?), and ?(11?,1664), where x=1 represents 2001 and x=8 represents 2008. Find the values? a, b, and c such that the equation y=ax^2 +...

Math
Bill cut a piece of cloth into 2 pieces. The length of the shorter piece is 5/9 of the longer piece. A find the ratio of the length of the longer piece to the length of the shorter piece to the total length. B if the longer piece is 148.6cm longer than the shorter piece.. Find...

Solid figures
A cylinderical 30 gallon container is 42 inches high,find the diameter of the cylinder. If 1 gallon= 231 inches.(Hint: Use proportion to find volume first.)

Math
Simplify the radical. 16 ---- 49

Statistics
In a distribution where the mean is to the right of the median, the histogram of the distribution will probably: a. have a longer tail on the right side b. show a uniform distribution c. be symmetric d. be bi-modal

math
2-squre of 3

math
Ron has a piece of rope 6 1/2 long,Tony has one that is 7 2/3m long.How long are their ropes if put together?

Math
Help please. find the area of a square with an edge of 13

Math
Help someone please

Math
A car travled 10km at 2pm and by 5pm it travled 80km how far did it travel round to the nearest whole number

Math
ariana runs up 4 flights of stairs and then back down 4 flights of stairs.Does this situation represent additive inverse

Math
Is this answer correct? What percent of .45 is .0015? the answer I got was 0.33%

algebra
b) 12

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?

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 ...

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?

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...

Science
@Steve

Science
How did the discovery of the electron change the atomic model? A.It disapproved the earlier idea of an invisible atom. B. It confirmed that atoms are very tiny C. it exposed fraudulent conducted by unqualified scientist D. It proved that atoms are easier to see than once ...

Social studies
Against what country was the atomic bomb used? A)Japan B)France C)Europe D)Russia

Math 10
Express as sum or difference of logarithm log of x(3x-5) to the base of 4

Math
36

Math
what is the lcm of 4,6,18

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?

Social Studies
Thank you

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 ...

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

chemistry
may i ask where did the 1.0 g/mL go?

Math
Find all solutions to the equation 3sqrt(3-x)=-3/2. The 3 is the small number outside of the sqrt.

Algebra
Do your own homework and figure it out

math
350 student in the school, 3 boys for every 2 girls how boys are there?

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'...

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

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 ...

URGENT Physics help
Object B is positive charged Charged polarization 0.30m 5.0x10^0C The comb will attract the bits of paper by charge polarization -3.0

college intermediate algebra
60

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....

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...

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 ...

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: ...

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. ...

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 ...

math- stat 201
I got 1.66667 so we should hire a new consultant?

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 ...

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 ...

History
Who financed the Middle, the South and the New England colonies?

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

U.S.History
How are Primeval and Saga related to U.S. history. Also what does Saga mean?

To MS SUE
Can u please check my math answers

Math check my answers
K thank u

Math check my answers
Square root**

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

chemistry
Express the following numbers in scientific notation. (c) 0.9589 (d) 745 (e) 74100 (f) 0.002031

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?

math
find the number of 8 units to the right of -3

chemistry - thank you:)
What volume of H2SO4 0.04 M is required to completely neutralize 200 mL of Al(OH)3 0.02M?

CHEMISTRY HELP!!!
A silver ring is dropped in a solution of Pb(NO3)2 for a certain period. Will you find it intact? Explain.

chemistry
Can a solution of CrCl3 be stored in an aluminum container?

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%?

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 ...

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?

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?

algebra2
What are the mean, variance and standard deviation of these values? 62,41,54,60,49,58.

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?

Algebra 2
I keep coming up with 1 as the answer and that's not a choice?

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

Algebra 2
What are the mean, variance, and standard deviation of these values? Round to the nearest 10th. 92, 97, 53, 90, 95, 98

algebra
Simplify 3x(x^2 + 6x - 8)

algebra
Thanks!

algebra
That's just the way the question was asked?

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

algebra
Simplify (uv)0 ______ (u3 v)2

Algebra
Simplify (x^-6)-3

Algebra
Simplify 6x - x^2 (x-3)

Algebra
Simplify (x-7)( x+7)

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...

algebra 2
what is the 6th term of the geometric sequence 2000, 800, 320,..../

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?

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.

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?

Algebra 2
Got it, thanks!

Algebra 2
What are the first 6 terms of the sequence with the explicit formula an=-3n2+4?

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

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

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.

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

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

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

Analytic Geometry
Are you all using directed distance?

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?

Language Arts
What does it mean to write a paper in APA format?

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.

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...

chemistry
what is the complete ionic equation for the double displacement of CuNO3(aq)+K2S(aq)

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 ...

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?

arithmetic
lim x->0 (e^x^2 - 1)/(square root(1+sinx)- square root(cosx))

world geography
c best answer

world geography
c best answer

world geography
The answer is b please read your book carefully

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