# Posts by William

Total # Posts: 365

**Pre-Calc**

cuz you know that the angle is in the top left you can use tan(x) = y/x to calculate the angle(it must be bigger than 90) than use cos(x) on your cal to find cos(x) or you can use x^2 + y^2 = hyp^2 to find the hyp and do (-1/5)/(hyp length) to get cos(x)

**physics**

change in KE = 1/2 mv2^2 - 1/2mv1^2 = 1/2m(v2^2-v1^2) where v2 and v1 are the final and initial speeds 242 = KE plug in numbers to get ans(mass) :D

**Physics**

This is a question related to work. Today we had a pop quiz in my physics class and I am just trying to check my work here :D 1) if there is a 5 kg block on a horizontal table connected with string to a 3 kg block hanging off the side of the table through a pulley. Assume the ...

**math**

Okay if you submitted those answers you made a 50 like me. but i suppose that's what i get right. The answers are actually B A D B

**Finance**

Your program has a proposed RDT&E-funded project scheduled to start in January 2015 which is expected to take 16 months to complete. The project is expected to cost a total of $16 million (then-year dollars), with cost expected to be incurred at a rate of $1 million per month...

**math**

Suppose that a crayon weighs the same as a marker. You have a box of crayons, 4 extra crayons, and 20 markers. Let b be the number of crayons in the box. A scale balances with all the crayons on one side and all the markers on the other. You remove markers from the scale so ...

**factorise completely**

2ax - 3ay + 2x - 3y

**chemistry**

An ore contains Fe3O4 and no other iron. The iron in a 65.46 gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 37.9 grams. What was the percent Fe3O4 in the sample of ore? Answer in units of %

**Math**

x =2(y+3) or y=3+1/2x

**chemistry**

At what angle (in degrees) must {111} planes of platinum (Pt) be exposed to a collimated beam of thee X-rays in order to obtain by diffraction monochromatic CrKα radiation.

**chemistry**

Gallium Arsenide ---------------- The charge carrier density of GaAs at 31o C is 2.25x106 cm-3. What is the charge carrier density (in cm-3) at 175oC? (The bandgap of GaAs is 1.42 eV. ) I am trying with arrhenius relationship but get confused over "charge carrier density&...

**chemistry**

Gallium Arsenide ---------------- The charge carrier density of GaAs at 31o C is 2.25x106 cm-3. What is the charge carrier density (in cm-3) at 175oC? (The bandgap of GaAs is 1.42 eV. )

**math**

Kendra bought 4 paintings and wants to hang them side by side on a wall in her bedroom. However, only 3 of the paintings will fit side by side on this wall. How many different ways can Kendra arrange 3 of the 4 paintings on the wall?

**Practical english**

Which of the following sentences contains an indefinite pronoun? A. This is Mary's necklace.

**Payroll Accounting**

For the old or latest Wage Bracket Tables and Percentage Tables, please go to Publication 15 (YEAR). Input the year for the correct Pub. 15.

**Payroll Accounting**

Answer is based on 2012 tax tables and rates. Use 2014 or 2013 tax tables and rates to get your answer. Late reply, but better than nothing. The answer is $663.45 for take-home pay. How: Step 1: Calculate FICA (OASDI & HI): Total wage subjected to FICA is $930. Why? ...

**Social Studies**

thats correct

**English**

Hello I need some ideas to elaborate on in an essay about the following question "1.According to Frankenstein what makes the Creature more “human,” his weaknesses or his strengths?Why?" Now I believe it is his weaknesses but i don't know what Victor ...

**math**

35/x + 0.2

**Beacon Height**

what is the time for the first clock

**EARTH SCIENCE**

number one is absolutly D i had gotten that one right.

**Lit**

What is a basic draft for a claim (Toulmin) about the theme. For example, "The theme of the piece is "blah-blah" " doesn't have an argument. What does?

**Math**

50 x 50 x 50 x 50

**English**

Fear not for these answers are still correct

**maths lite,life science,geography and tourism**

What career can I take

**Grammar Advisor**

Are these correct? I mark my answer with an X. 88. The reason to list all of the preliminary (non-procedural) information in a lesson plan is to be sure have considered each aspect. keep good records for your future needs. be able to communicate clearly with administrators, ...

**Grammar Advisor**

I just cannot figure out if these answers are correct or not. Can you please help me? 78. If the sound system hadn’t failed, last night’s show would have been better. This is a correct sentence using the 1st conditional form. x This is a correct sentence using the ...

**math**

what are the 5 number combo in 1 to 39

**Science**

Which of the following is an environmental concern of genetically engineered crops mentioned in your text? (Points : 1) Genetically modified crops lead to larger applications of toxic herbicides and insecticides. The genetic modification of crops increases soil erosion while ...

**math**

Joan receives an annual salary of $22,768.68. What is the total amount of her gross pay each period if she is paid monthly?

**math**

Erma is paid $516.72 biweekly. What are her annual earnings?

**math**

Sheila received a 6.5% commission on a house she sold for $110,400. How much commission did she receive?

**american history**

Under the _______ system, Spanish conquistadors were rewarded with local villages and control over the local labor force

**math**

Explain whether the following statement is true or false: “The ordered pair (1,5) is the same as the order pair (5,1).”

**Math**

can any one add or subtact this (m^2 - m - 4) + (m - 5)

**Combining Inequalities**

Some treasure has been buried at a point(x,y)on the grid, where x and y are whole numbers. Here are three clues to help you to find the treasure: Clue 1:x>2 Clue 2:x+y<8 Clue 3: 2y-x>0

**Science**

Which of the following is true about an object that floats in water? (1 point) The object is less dense than frozen water. The mass of the object is less than that of water. The density of the object is less than that of water. The volume of the water is greater than the ...

**math**

the floor area of a rectangular storm shelter is 65 square meters, and its length is 6.5 meteres. What is the width of the storm shelter

**Physical Science**

An exercise spring has a spring constant of 315 N/m. How much work is required to stretch the spring 30 cm? What force is needed to stretch the spring 30 cm?

**8th Grade Science**

Label these reactants and products: 3Fe + 2 O2> Fe3O4

**science**

yes

**math**

thank you!

**math**

I am moving to a new house. My old house is 3 kilometers from my new house. How many meters is the old house from the new house?

**Psychology**

Sources of stress do not automatically cause stress-related problems. Moderators of stress, which can include our personal strengths, might mean that we can have a healthier and more productive life in spite of life's challenges, or maybe even because of them. As the text ...

**4 gr**

thank u :)

**4 gr**

forty people are lined up to ride the ski lift to the top of the mountain. Each chair on the holds 3 people. How many chairs will it take to get everyone up the mountain?

**arrays**

One band has fewer than 40 speakers. They stack them in a array exactly 9 high. How many speakers could they have? Explain how you know.

**arrays**

Another band has 48 speakers. They stack them at least 4 high, but no taller than 6 high. What are all the different arrays they can make?

**arrays**

One band has 30 speakers. They stack them at least 3 high, but no taller than 6 high. What are all the different arrays they could make?

**arrays**

thank u :)

**arrays**

Rock bands often stack their speakers in an array. One teen band has 24 speakers. They stack them at least 2 high, but no taller than 8 high. What are all the different arrays they can make.

**arrays**

another band has 48 speakers. they stack them at 4 high, but no taller than 6 high. what are all the different arrays they can make?

**arrays**

another band has 30 speakers. they stack them at least 4 high, but no taller than 6 high. what are all the different arrays they could make?

**math**

No way im in connections academy in 8th grade as well lol. We should totally get in contact sometime. i just got in this school so i may need help trying to figure it out.

**social studies**

Which of the following best describes the difference between a keyword and subject search? Please make selection! A keyword search uses subject headings, but a subject search does not A subject search can retrieve false hits, but a keyword search does not A subject search uses...

**math**

(4+4)+(4/4)=9

**vocabulary**

The ----------- definition of gloomy is dismal or depressing.

**Probability**

In a raffle there are four winning tickets from 12, What is the probability from six tickets there are two winners? Thank you in advance.

**LIfe orientation**

Identify and descriibe one environmental problem that causes ill health

**Life Orientation**

Describe one environmental problem that causes ill health,accidents,crises and disasters

**chemisttry**

how many ml of a 1 M NaOH solution do you need to add to a 250 ml flask and bring it to volume with deionized water to make a 0.12 M NaOH solution

**physics**

A piece of metal at 80 degrees celsius is placed in 1.2 L of water at 72 degrees celsius. The system is thermally isolated and reaches a final temperature of 75 degrees celsius. Estimate the approximate change in entrophy for this process.

**physics**

Explain how the specific heats of materials are measured using the technique of calorimetry.

**physics**

Heat is added to an ideal gas at 20 degrees Celsius. If the internal energy of the gas increases by a factor of three during this process, what is the final temperature?

**Finance**

The target capital structure for QM Industries is 39% common stock 6% is preferred stock, and 55% debt. If the costs of common equity for the firm is 18.2%, and the cost of preferred stock is 9.4%, the before tax cost of debt is 7.5%, and the firms tax rate is 35% what is QM&#...

**Math**

One bag contains 2 green marbles and 4 white marbles and a second bag contains 3 green marbles and 1 white marble. If Jon randomly draws one marble from each bag what is the probability that they are both green?

**Physics**

At a city park, a person throws some bread into a duck pond. Two 4.00-kg ducks and a 9.00-kg goose paddle rapidly toward the bread, as shown in our sketch (Intro 1 figure) . If the ducks swim at 1.10 m/s, and the goose swims with a speed of 1.30 m/s, the total momentum of the ...

**6th Grade Math**

Which of the following translations corresponds to the matrix ?

**calculus**

The circumference of a sphere was measured to be 74 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the maximum error in the calculated surface area. (Round your answer to the nearest integer.) cm2 What is the relative error? (Round your answer to three ...

**payroll accounting**

Based on 2012 tax tables and rates. Late reply, but better than nothing. The answer is $663.45 for take-home pay. How: Step 1: Calculate FICA (OASDI & HI): Total wage subjected to FICA is $930. Why? Contributions to 401K is only exempted from Fed. Income Tax Withholding (FIT) ...

**Math**

Find the value of constant n if the lines y=(n-2)x+12 and 3x-4y+5=0 are: a) parallel and b) perpendicular to each other. Thanks in advance.

**Basic Math**

How do you solve: 5/30 + 3/40 + 1/8

**physics**

A diver has a mass of 75 kg takes part in a competition by having to perform 10 dives off the 10m platform above the water. Before he takes part he snacks on an energy bar (150 g) which provides 15 kj of energy. How many would the diver need to consume to meet the necessary ...

**Math**

Thank you so much Reiny =]

**Finance**

Winnebagel Corp. currently sells 33,000 motor homes per year at $49,500 each, and 13,200 luxury motor coaches per year at $93,500 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 23,100 of these campers per year at $13,...

**chemistry**

For which salt in each of the following groups will the solubility depend on pH? Pb(OH)2 PbCl2

**chemistry**

How many moles of carbon tetrahydride are needed to produce 3.59 moles of water

**math**

find 45 of 60

**math**

How you can use a hundred chart to subtract 12 from 46

**programming**

creat a logic for a program that continuously prompts the user for a numeric number of dollars until the user enters 0. pass each entered amount to a conversion method that displays breakdown of the passed amount into the fewest bills

**chemistry**

The combustion of 0.1619 g benzoic acid increases the temperature of a bomb calorimeter by 2.77°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) kJ/°C A 0.1510 g sample of vanillin (C8H8O3) is then ...

**chemistry**

Consider the dissolution of CaCl2. CaCl2(s) Ca2+(aq) + 2 Cl-(aq) ΔH = -81.5 kJ A 13.0 g sample of CaCl2 is dissolved in 134 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and ...

**math PLEASE HURRY**

72 magnets 24 pairs

**Math**

What is the next number in the sequence 270, 27, 2.7,0.27

**Physics**

A car can slow down at 5.10 m/s2 without skidding when coming to rest on a level road. What would its acceleration be if the road were inclined at 12o uphill? [Ask yourself – What is the same about the situation on the level road and on the incline?]

**phusics**

A car can slow down at 5.10 m/s2 without skidding when coming to rest on a level road. What would its acceleration be if the road were inclined at 12o uphill?

**math**

find the product or quotient. write the strategy you used, write model, break apart, multiplication table, inverse operations, pattern, or doubles

**college physics**

A 4.5 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 5.4 cm away from the lens. The lens forms an inverted image of the insect which is 0.9 cm long on a screen behind the lens. a. How far behind the lens is the screen? b. What is the lens' ...

**college physics**

I know you need to use geometry but i don't know how a room which is h = 9.0 feet tall and r = 12.0 feet wide. Attached to the ceiling is a piece of glass (with unknown index of refraction) which is 2.5 feet thick. A laser pointer in the bottom left corner is aimed so that...

**math**

What is the value of the underline digit 6 in 4,600,028

**4th grade math**

what is the value of the underline digit 6.... 4,600,028

**physics**

true or false only animals undergo respiration

**chem**

which of these are strong electrolytes, weak electrolytes and non electrolytes. H2SO4 FeCl2 HClO AgCl I put AgCl as a non H2So4 and HCl as strong FeCl2 as weak but the computer told me my answer is wrong Can some one help please?

**Chemistry**

100 grams of glucose is mixed with 500 grams of water. 10 grams of yeast is then added to the mixture. If the reaction goes to completion, what is the mass of ethanol in the final mixture?

**com**

Is the below paragraph and evaluation? Hockenbury and Hockenbury present important information and raise some interesting questions about how daily hassles affect our lives. In a few paragraphs, they present a great deal of information on the subject of daily hassles — ...

**College Help**

I am a Sophomore in High School. I have a GPA of 3.3 currently, (it's very bad) with no AP classes taken until Junior and Senior year. What are my chances of getting into UC Irvine? That's the school I really want to get into!

**Com**

Could you please tell me if the first sentence in each paragraph are topic sentences. The higher the interest rate of credit cards, mortgage or vehicles, the less cash we have in our pockets. When the interest rate of savings is higher that means more money in your pocket. If ...

**Math**

Just to clarify, 18/2= 9 therefore its in position 9 and 10? then add up and divided by two again? This is only for an even number of data right?

**Math**

The following data represent what 18 people said when they were asked to estimate the crowd at a public gathering: 325 450 500 500 550 575 575 600 600 650 650 700 700 700 725 750 800 900 State the mean, mode, median Mean: 325+450+500+500+550+575+575+600+ 600+650+650+700+700+...

**Math**

Two similar triangles. 1) 5.8m, 5m long,3m high 2)?m, 28m long, 16.8m high. Find the length of VR, the direct distance of the river, to the nearest tenth.