Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 491

**math**

okay but the options i have to choose from are: a. 26Pi in. b. 6.5Pi in. c. 13Pi in. d. 42.25Pi in. e. 169Pi in. i think it's a. right?

**math**

the pi is 3.14

**math**

i am confused??

**math**

what is the exact circumference of a circle with a diameter of 13 inches?

**math**

i got that too! thank u :)

**math**

Find the area of a square if 1 side measures 22 cm. Include correct units with solution.

**math**

l * w right?

**math**

Find the area of a rectangle if its length measure 12 cm and its width measures 13 cm. Include correct units with the solution.

**Differential Equations**

A car is traveling at 70 mph skids 240 ft after it's breaks are suddenly applied. Assuming that the cars breaking system provides a constant deceleration, find that deceleration. How long did it take the car to stop?

**global history.**

What did people in Ancient Greece trade with other countries? What were the trade routes, what did they trade, and finally, what was the effect on Greece ?

**math**

A vase in the shape of a sqare based pyramid just fits inside a box in the shape of a square based prism. If the prism has the volume of 720 cm then what is the volume of the vase?

**english**

What value does Macbeth put on his soul in Act III, Scene I of "Macbeth" by Shakespeare.

**Physics**

a chain pulls tangentially on a 33.4kg uniform cylindrical gear with tension of 70.1 N. the chain is attached along outside radius at 0.794m from the axis of rotation. starting from rest gear takes 1.59 s to reach rotational speed of 1.08 rev/s. what is total frictional torque...

**Physics**

A boy of mass 37.8kg. is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.02 above the net. The firefighters lower their arms and he lands in the net so that he is brought to a complete stop in a time of 0.491 s. What is h...

**8th grade algebra: radicals**

please help me solve these 1. 2√5/8 + 4√3/8 - 1/2√68 2. √4k-5 +1=8 (the radical sign goes over 4k-5) 3. (x+4)*2 /3 =8 4. Write the value of the discriminant of each equation. Then use it to decide how many different real-number roots the equation has. x...

**Programming Logic**

I need to create a flowchart/psuedocode for a dice game that give you 2 rolls with 5 dice, 3 rolls per game. the computer will roll the 4 dice and calculate your score. my question is...do i need to repeat this 3 times and can i use nested loops and if so..how do i set this up...

**physics**

Dispersion in a window pane. In the figure on the left, a beam of white light is incident at angle θ = 51° on a common window pane (shown in cross section). For the pane's type of glass, the index of refraction for visible light ranges from 1.528 at the blue end o...

**chemistry**

5.00 atm

**Chem**

H2SO4 +NaCO3 > Na2SO4 +Co2 +H2O if 150.0 g Of Sulfuric acids is spilled what is the minimum number of moles of sodium carbonate to complete this reaction?

**pre calc**

lnX + ln2 = 3

**biology / help me **

The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose mother...

**please help me **

The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose mother...

**biology /help**

. The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose moth...

**Chemistry**

An unknown compound X is one of the four compounds listed in the table below. A mixture of X with o-toluic acid melts at 100 degrees Celsius, a mixture of X with benzoic acid melts at 112 degrees Celsius, a mixture of X with phenyl succinate melts at 110 degrees Celsius, and a...

**chemistry**

Ok now I have to find the mole fraction of the solvent. I know the formula, which is the moles of a substance/ total moles of solution. Is the moles of the substance the number we just obtained? And which is the "total" moles of solution?

**chemistry**

Sorry the 18.02 is for water.

**chemistry**

To find the moles of solvent present, would you divide the mass the solvent by 18.02g/mol? I am given this: MM=18.02g/mol

**chemistry**

How do you find the mass of a solution if you have 1L of 2.5 M MgCl2. I have determined how many moles are present in MgCl2 which was 2.5 and how grams are present which came out to be 238.025g Now I'm asked "What is the mass of the solution and the mass of the solven...

**Organic Chemistry**

What is the major product from the sulfuric acid and Hg(II)-catalyzed hydration ethynylcyclohexane?

**math**

Yes, thank you for thw awswers to my homework.

**math**

Thanks guys that really helped me on my homework :D im in 5th grade

**math**

Thanks guys that really helped me on my homework :D im in 5th grade

**Math**

a building cast a 235 ft shadow along the ground. the angle of the sun's ray with the ground is 24 degrees. How tall is the building?

**eth/125**

How do you think slavery influenced the evolution of both Black and White America today?

**Math**

I still don't get it..?

**Math**

24 - 20 = 4

**Math**

4, but they're asking what's the mistake that was made in the problem. Because 100 isn't the correct answer.. I'm really stumped on this. :(

**Math**

Describe the mistakes. 3 x 8 - 4 x 5 = 100

**Math**

Thanks so much!! :)

**Math**

A recipe calls for 4 1/2 cups of flour for 72 cookies. How many cups of flour would be needed for 48 cookies?

**Writing**

What is the effect of smoking near others?

**math 20**

Using the procedure of comlpeting the square, write the equation x^2+y^2-6x+8y=0 in the form (x-h)^2+(y-k)^2=r^2. state the domain and range where(h,k) is the center of the circle and r is the radius

**spelling**

what is the analogy for thorn

**math**

the line passes through the point (3,-8) and ,(-7,1)

**science**

How much work is done on a 30 N rock that is lifted 1.5 m off the ground? show work.

**Algebra 1**

-3x+6<21 -6 -6 -3x<15 /-3 /-3 x<-5

**chemistry**

what volume of 0.250 M calcium chloride needs to be added to sodium phosphate to produce 35.0 g of calcium phosphate ?

**12th grade**

Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 40 kg boy weigh on the moon? (Round answer to nearest tenth.)

**Physics**

A particular guitar string is supposed to vibrate at 220 , but it is measured to vibrate at 230 . By what percent should the tension in the string be changed to correct the frequency? I have been working for 7 hours of hw! Please help!

**chemistry**

oops sorry.. did not mean to post this twice

**chemistry**

If a solution appears to be violet, what range of wavelength would you use for analysis of the solution? How about if the solution was blue-green?

**Chemistry- wavelengths**

a. If a solution appears to be violet, what range of wavelength would you use for analysis of the solution? b. How about if the solution was blue-green?

**Chemistry**

What is the pH of the solution obtained when 125 mL of 0.614M NaOH is diluted to 16.0 L with water?

**spanish **

yo bebo mucha agua..is this right?

**math**

(Y+3)^2/5+4(Y+3)^7/5=0 solve this equation by factoring. I don't know how to factor problems like this

**science**

Is Saturn's orbit more elliptical and it's tilt larger than Jupiter's?

**Thermochemistry**

H=? q=2.426 kJ w=-6 kJ Therefore, E=-8

**Math**

A thousandths grid is completely coloured in when tree different decimals are shown. One decimal is double of the others.

**philosophy**

In mediation 3 what does it mean to have the formal/inherent reality of things and the objective/representative reality of ideas? Thanks, Jenna

**chemistry**

if 30ml of .150 M CaCl2 is added to 22.5ml of .1 M AgNO3, what is the mass of the AgCl precipitate?

**3rd grade math (array)**

write two ways to break apart each array

**physics**

spherical aluminum ball of mass 1.22 kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water.Calculate the radius of the cavity.

**math**

How do you write a number in expanded form?

**PHYSICS-HELP!!**

Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1500 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out by heading due north ...

**Physics**

I have a quick question, If a ballplayer catches a ball 3.0s after throwing it vertically upward. With what speed did he throw it, and what height did it reach?

**physics**

thank you very much

**physics**

A pump is installed in the basement of a 10-storey building in order to supply the occupants with water. Each storey is 3m high. How much pressure must the pump exert on the water so that the water reaches the 10th floor with a pressure of 400 kPa?

**Physics**

Within a book on a desk there are billions of forces pushing and pulling on all the molecules. Why is it that these forces never by chance add up to a net force in one direction, causing the book to accelerate "spontaneously" across the desk?

**Accounting**

Please check my answers. Identify each of the following as either assets, liabilities, or owner's equity. 1. Petty cash- Owner's Equity 2. Mortgage payable- Liabilities 3. Furniture- Assets 4. Owner's Capital- Owner's Equity 5. Food inventory- Assets 6. Profit-...

**Math**

Use the discriminant to determine how many real number solutions the equation has 1-7a^2=-7a-2

**Math**

5x^2+4x+6=0, given the graph of y=5x^2+4x+6

**Math**

Give the equation of the line that is perpendicular to the line y=-3+7 and passes through point (0,-6)

**Math 157 **

how many polygon arrangements does a semi-regular tessellation have?

**Chemistry**

A cubic piece of metal measures 6.50 on each edge. If the metal is nickel, whose density is 8.90 , what is the mass of the cube?

**chemistry**

Data obtained from lab (neutralization): H2SO4: C =1.0mol/l V = 30 mL Initial temp. = 24.1 NaOH c= 1.0mol/L v= 50 mL initial temp. = 23.9 Final temp. of H2SO4 & NaOH = 32.9 Assume specific heat capacity of both these substance is equal to water's = 4.19 Calculate the molar...

**Chemistry 30**

According to the data booklet Cu(NO3)2 and Sn(s) are spontaneous Cu2+ being a strong reducing agent and Sn(s) being a strong oxidizing agent but according this lab: d2l.adlc.ca/content/ADLC-Depts/ScienceSH/SCN3796-5cBl-08Feb10/chemistry_30/mm/m3/m3_l3_testing_predictions/m3_l3...

**Math 157**

The chart on the next page is an example of a quality control chart. Samples of parts and products are drawn from an assembly line and checked against engineering specifications. Write a short report describing the various features of the chart and the performance of the machi...

**Chemistry **

That's really easy. you do 250/100 which is 2.5 then, you multiply that to the mass of KCl and get 90g like what the other person said.

**math/area**

On grid paper I have a capital letter I three cubes across to make the top of letter I, three cubes in the middle, and three cubes across the bottom? So, how would I figure out the area?

**Math**

Yesterday someone posted my exact question, but I can't find the answer. What is area/perimeter of capital letters: I, U, and J? I know that area= lxw P= add up all the sides The area part is hard to figure

**Math**

number 9 is D

**math**

The Rental Depreciation Problem. The owner of a rental house can depreciate its value over a period of 27 ½ years, meaning that the value of the house declines at an even rate over that period of time until the value is $0. a. By what fraction does the value of the hous...

**english**

ur welcome emilio

**english**

Search on the internet for more details about earthquakes.

**english**

An earthquake is a violent shaking of the Earth's crust that may cause destruction to buildings and results from the sudden release of tectonic stress along a fault line or from volcanic activity.

**Math**

Suppose r(x) = 8(x)^(1/2) represents revenue and c(x) = 2(x)^2 represents cost, with x measured in thousands of units. Is there a production level that maximizes profit? If so, what is it?

**Elementary math for teachers**

Scoring in Golf. A golfer played 8 rounds on a tournament course with the following scores (par is the expected score for a round; negative numbers represent the number of strokes under par for the round, and positive numbers represent the number of strokes over par for the ro...

**History WWII**

Can you help me put the following events in order: -hitler declares austria part of germany -naie terrorize jewish on "kristallnacht -france and GB agree to defend Poland -hitler and stalin sign a friendship treaty -the leaders of GB, France, Italy and Germany meet -nazi ...

**math**

write 40% two different ways

**Geometry**

BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:3. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of triangle ABC and trian...

**math 221**

.25

**math**

find the volume of the solid whose base is bounded by y=e^(-x), y=3cos(x), and x=0 and whose cross sections cut by planes perpendicular to the x-axis are squares the answer is 3.992 units cubed but can someone explain to me how to get this answer using integrals?

**science**

where in the renal tubule is potassium and sodium reabsorbed by the blood?

**chemistry **

thank you :)

**chemistry **

How many electrons are transferred in the production of 6.06×10^−4 mol H2(g) from water?

**Science**

You throw a ball upward and then it falls back down. How does the velocity of the ball change as it rises and falls?

**Chemisrty**

okay so if the molar mass of Na3PO4 is 164. a multiply that by 0.1 and then multiply that by o.25 ??

**Chemisrty**

how do i solve for XXXX

**Chemisrty**

what mass of sodium phosphate is required to make 250mL of 0.10mol/L solution?

**Chemistry**

How many electrons and how many protons are in the ion Cr6+?

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