1. Science Plzz Help

1. Which of the following types of joints allows the type of shoulder motion needed by a baseball pitcher to pitch a fastball in a baseball game? A. pivot B. gliding C. hinge D. ball and socket*** 2. Which of the following pairs of joints represents the

2. Math

The Beeville City Council surveyed 500 Beeville citizens. Of those surveyed, 350 citizens named summer as their favorite season. Based on the survey results, how many of the 36,500 Beeville citizens would most likely name summer as their favorite season?

3. Math

You are surveying students to find out their opinion of the quality of food served in the school cafeteria. You decide to poll only those students who buy hot lunch on a particular day. Is your sample random? Explain I think it would be but I'm not sure.

35. Physics

A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror what is the focal length position of object magnification of object height of object

36. Statistics (39)

Suppose a random sample of size 40 is selected from a population with = 9. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The population size is infinite (to

37. Statistics (38)

Many drugs used to treat cancer are expensive. BusinessWeek reported on the cost per treatment of Herceptin, a drug used to treat breast cancer (BusinessWeek, January 30, 2006). Typical treatment costs (in dollars) for Herceptin are provided by a simple

All of the following statements concerning crystal field theory are true EXCEPT a. in low-spin complexes, electrons are concentrated in the dxy, dyz, and dxz orbitals. b. in an isolated atom or ion, the five d orbitals have identical energy. c. low-spin

39. Social studies

Which new deal agency is best remembered for its art-related projects

40. physic

In a serious accident, a nuclear power plant's reactor vessel cracks, and all of the cooling water drains out. Although nuclear fission stops, radioactive decay continues to heat

41. CHEMISTRY HELP !!!!

Assuming the following reaction proceeds in the forward direction, 3 Sn4+(aq) + 2 Cr(s)  3 Sn2+(aq) + 2 Cr3+(aq) a. Sn4+(aq) is the reducing agent and Cr(s) is the oxidizing agent. b. Cr(s) is the reducing agent and Sn2+(aq) is the oxidizing agent. c.

42. algebra

1. Explain the concept of modeling. How does a model describe known data and predict future data? How do models break down (what can cause this)? Can you think of an example? 2. Imagine that points on a line on a Cartesian graph represent approximately the

43. Statistics (46)

The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of

44. chemistry

A silver block, initially at 59.4∘C^\circ C, is submerged into 100.0 g{\rm g} of water at 25.3∘C^\circ C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 27.6∘C^\circ C.

80. Chemistry

Calculate the volume of 2.00 M solution of KOH that is required to neutralize 30.0 mL of 1.00 M solution of HNO3.

81. social studies

what land did the United States gain from the War of 1812? New Orleans

82. MATH

It is estimated that 17% of americans have blue eyes. A random sample of 9 americans is selected. 1. Find the mean number of blu-eyed people in a sample of 9 americans.

146. Law

1. Once Fourth Amendment protections have been triggered, the next stage in the analysis requires that we focus on: A. the reasonableness of the search or seizure. B. any secret agenda behind the search or seizure. C. the time of day of the search. D. the

147. Chemistry

A tank contains helium for filling balloons. It holds 6.75 L of Ne at 24.8 atm and 27.5 °C. What would be the volume of this helium at 2.13 atm and 10.6 °C?

148. Math

If a, b, and c are three integers in geometric progression, prove that the number a^2+b^2+c^2 is exactly divisible by the number a+b+c.

149. science

My answers are in the brackets Nitrogen is cycled through an ecosystem by both plants and ?(animals). Decomposers break down dead organisms and their waste products to release ?(ammonia) in a process called ?(nitrification) These ?(decomposers) can then be

150. maths

Simplify; x^2 - x - 6/ 6xy divide x^2 - 9/2x^2y

151. Math

When an engineer inspects a pipeline she notices a high water mark. How much space is there between the high water level and the top of the pipe, to the nearest hundredth. The diameter of the pipe is 1.2m and the horiztonal distance across the surface of

152. geography

state and define seven elements of weather

153. English

I have to write a critical essay on Hamlet and I can't find a good topic to write about. I need something that will be easy because I am not good in writing essays that are more elaborate. Can somebody suggest a good topic that will be easy to write about

154. chemistry

What is the [C7H5O2−] in a solution which is 0.1283 M in HC7H5O2 and 0.1364 M in HBr? HC7H5O2(aq) + H2O(l) « C7H5O2−(aq) + H3O+(aq) Ka = 6.5000e-5

155. chemistry

What is the [CH3NH3+] of a solution which is 0.1003 M in CH3NH2 and 0.1204 M in CsOH? CH3NH2(aq) + H2O(l) « CH3NH3+(aq) + OH−(aq)

156. History

Please explain what the three reconstruction plans have in common and how they are different? Thank you

157. Accounting

Use the following information to answer questions 5-7. Blue Bird Bus Company is suffering declining sales of its principal product, school buses. The bank has threatened to call due a note if the company’s net income declines next year. The president,

158. ALGEBRA

Simplify. (x^2-3x-10)/(x+2) How? (I don't have any answers for this one)

159. Theater

What were some important props in William Shakespeare's Titus Andronicus and what did they represent?

160. Economics

Are there any current subsidy or welfare issues that or being disused or addressed in parliament or in municipality

161. PCT

Anyone good with Patient care Tech?

162. Chemistry

Calculate the molarity of an HCI solution, if 20.0 mL of it were neutralized by 10.0 mL of 2.00 M solution of NaOH.

163. Economics

Difference of fair work act 2009 and australian pay and conditions standard. Thank you

1. Find 5A-3B. A=[6 -5 8], B=[7 5 -6] [5 -4 3] [4 3 -4] 2. Solve the matrix equation. [3 -1] - x=[-2 3] [2 5] [1 -6] 3. Given A=[1 -1 2] and B=[-1 -3 2], [3 0 5] [2 4 5] [0 2 -2] Find AB. 4. What is the inverse of [-100 -25]? [-5 -6]

165. finance

a bond that has a $1,000 par value ((face value)) and a coupon interest rate of 10.1% the bonds have a current market value of$1,127 and will mature in 10 years the firm's marginal tax rate is 34% the cost of capital from this debt is %

how would you describe romeos best friend. what kind of a person is he? how does his personality differ from that of Benvolio.

two way in which Lord Capulet demonstrates that he is head of the household.

168. Law

1. A description of the statute 18 U.S.C. Section 3501 is: A. An act of Congress that confirmed the Miranda v. Arizona decision. B. The U.S. Code designation assigned to the Crime Control Act of 1968, which attempted to invalidate the Miranda v. Arizona

169. Math!!

-3(-9) + (3 + 2(5)squared =

170. Algebra

factoring 18z+45+z^2

171. Physics

Part A Determine the energy of a photon whose absorption changes a He+ ion from the n = 1 to the n = 6 state. Determine the wavelength of a photon whose absorption changes a He+ ion from the n = 1 to the n = 6 state. Determine the frequency of a photon

172. science

Why can an array of smaller interferometers have a better angular resolution than one large interferometer?

173. math

Write an equation of a line in standard form with a slope of -8 and passing through the point (-10, 2).

174. maths

Simplify; p^2 - p - 42

175. physics

Why does the pitch of the sound produce by blowing over an open end of a bottle change when you have more water in it?

176. Algebre

Please help I don't understand Contract the expression this is use properties of logarithm to write each expression as a single logarithm with a coefficient of 1. In3-3 In 9 +In 18 In3-2 in (9=6) In 3-2 (In 4 In 8) Thank you so much

177. physics

The gravitational field strength at 35700km above earth is .225N/kg. what is the tangental velocity of a 100000kg communication satellite? mass of earth = 5.98E24kg and radius of earth = 6.37E6m

178. math

Math two/y=2 ___ ____

179. algebra

Please Explain how to factor the following trinomials forms: x2 + bx + c and ax2 + bx + c in words.

180. Social Studies

Driving to Corning, NY from New York City, NY and walking from Corning, NY to Goat Island, Niagara Falls, you wouldn't cross any bodies of water, mountains, or deserts? Right? I searched but I didn't get anything, I just want to make sure.

181. chemistry

Calculate the molar it of a solution that contains 5.4 get of sodium sulfate dissolved in enough water to make 3.5 L of solution

182. chemistry

If you have a 29.6 mass percent KCl in benzene,what is the new boiling point?

183. hydraulics

If a drain pipe 18 inches in diameter is running from a surface storm drain into a body of water where the discharge is submerged will the water flow out of the submerged open end. Storm drain is approximately 6 feet above the submerged end of the pipe.

184. Trigonometry

Verify the identity. (Cos x - sin x)^2 + (cos x + sin x)^2=2

185. social studies

what is one factor that contributes to philadelphias reputation as an important industrial center

186. Trigonometry.

Use the given information to evaluate cos (a-b). Cot a = 3/4, cot b = 24/25; pi

187. physics

What is a property of metals?

188. Accounting

The Bayside Company uses the LIFO cost flow method to value inventory. In the current year, profit at Bayside is running unusually high. The corporate tax rate is also high this year but it is scheduled to decline significantly next year. In light of this

212. physics

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The

213. Math

a/(a+3) = (2a)/(a - 3) - 1

214. Physics

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The

215. math

suppose the ratio of your income last year to your income this year is 3 to 2. explain what this means. give an example of the dollars earned last year and this year that fits the 3 to 2 ratio.

216. Chemistry

How do i provide ionic equations , for example to this one --> HNO3(aq) + KOH(aq)

217. social studies

I would want to know the questions and answers for grade 4 week 10

218. math

lou makes pancakes at a pancake house. he makes 12 pancakes in 4 minutes. at a rate, how long would it take him to make 54 pancakes

219. Algebra

a/(a+3) = (2a)/(a - 3) - 1

What are the perils of the amazon rain forest?

221. why

What is liboche unscrambled in spanish?

222. algebra

solve the system of equation 2x+y=5 y^2-2y=-3x+5

223. maths

Simplify 5x/7 × 15y/8x

224. physics

how fast must a .11kg toy car travel at the top of a loop in toy track not to fall off if the radius of the loop is .15m?

225. maths

Simplify; (x - y)^3 divide x^2z - 2xyz + y^2z

226. physics

a 2000kg car approaches a 1000m radius curve. If the amount of friction is 1800 N and it have velocity of 30m/sec will the car be able to make the turn?

227. physics

A steel sphere of radius 6.5 mm is dropped into a lake. What is the terminal speed of the sphere?

228. physics

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The

229. pre algebra

is the following a non linear function? y = 3x squared + 1

230. English

I am from the city proper. Q1:What is 'city proper' in England? Q2: At the Great Fire of London, what was the population of London? More than 500,000 or 80,000? City proper was 1/6 of Londoners.....

231. Math

Add: 2/y^2 - 3x/y-x - 3/y

232. Math 2

Thomas is making punch for a party. He mixes two 32 ounce bottles of ginger ale with 3 16 ounce bottles of fruit punch. He wants to pour the punch into 8 ounce cups. How many cups can Thomas fill?

233. Math 3

A school cafeteria serves. 60,000 ounces of milk during a 3 school week period. If the same amount is served each day, how much milk does the cafeteria serve each day?