Sunday

October 23, 2016
Total # Posts: 621

**Math**

Write the following without negative exponents: (a^-1 + b^-1)^-1

*August 20, 2011*

**Math**

Solve the following equation for t : 3/t + 2/m = 2

*August 18, 2011*

**college math**

Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {16, 17, 18, 19, 20}

*July 8, 2011*

**Math**

Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set a) A ∩ B b) A U C c) B U C d) (A U B) ∩ C e) A U (B U C) f) (A ∩ B) ∩ C g) (A ∩ B) U C

*July 8, 2011*

**Math-geometry**

Given these sets: A = {3, 4, 5, 6, 7} B = {6, 7, 8, 9} C = {2, 4, 6, 8} List the elements of this set A intersect(B∩C)

*July 7, 2011*

**Math**

Given the following set, select the statement below that is true. V = {a, e, i, o, u} s ∈ V o ∉ V e ∈ V V intersect Ø w ∈ V

*July 7, 2011*

**Math**

Given the following sets, select the statement below that is true. A = {l, a, t, e, r}, B = {l, a, t, e}, C = {t, a, l, e}, D = {e, a, t} B ⊂ C and C ⊆ A C ⊆ B and D ⊂ B D ⊂ A and A ⊂ D B ⊂ A and C ⊂ D D ⊆ A and A ⊂ C

*July 7, 2011*

**Geometry-help please :(**

Given the following sets, select the statement below that is true. A = {l, a, t, e, r}, B = {l, a, t, e}, C = {t, a, l, e}, D = {e, a, t}

*July 7, 2011*

**Math**

Given the following set, select the statement below that is true. V = {a, e, i, o, u}

*July 7, 2011*

**Math**

Given the following set, select the statement below that is true. V = {a, e, i, o, u}

*July 7, 2011*

**Math**

Given the following sets, select the statement below that is true. A = {l, a, t, e, r}, B = {l, a, t, e}, C = {t, a, l, e}, D = {e, a, t}

*July 7, 2011*

**math**

so its 225pi sq. in?

*July 4, 2011*

**math**

what is the exact area of a circle with a diameter of 15 inches?

*July 4, 2011*

**math**

i think its 16.49 in^3 right?

*July 3, 2011*

**math**

how many cubic inches of ice cream can an ice cream cone hold (within the cone) if its height is 7 inches and the diameter of its base is 3 inches? give solution accurate to the nearest hundredth.

*July 3, 2011*

**math**

i don't think im getting this problem...would it be 20 * 52 = 1040 mm? PLEASE ASSIST :(

*July 3, 2011*

**math**

im still a little confused with this problem....

*July 3, 2011*

**math**

i think P = a + b + c right? and A = 1/2bh right?

*July 3, 2011*

**math**

find the perimeter and area of a right triangle if the shortest side is 20 mm. and the longest side is 52 mm. include correct units with each part in solution.

*July 3, 2011*

**math **

would i use a^3?

*July 3, 2011*

**math **

how many cubic cm can a cigar box hold if its dimensions are 4 cm. by 14 cm. by 12 cm? include correct units with solution.

*July 3, 2011*

**math**

i thought that was how you solve it. thanks!

*July 3, 2011*

**math**

in a 9 in. sq. cake pan and 1 10 in. sq. cake pan, what is the difference in volume each pan will hold? assume each pan is 3 in. high. show step by step work and correct units with solution.

*July 3, 2011*

**math**

that's what i got. thank u :)

*July 3, 2011*

**math**

exactly how many cubic inches of ice cream can an ice cream cone hold (within the cone) if its height is 6 inches and the radius of its base is 2.5 inches? include correct units with the solution. use "pi" in place of the pi symbol.

*July 3, 2011*

**math**

i am not sure....

*July 3, 2011*

**math**

how many cubic cm can a cigar box hold if its diameter is 4 cm by 10.5 cm by 7 cm?

*July 3, 2011*

**math**

a right triangle has to be 90 degrees right?

*July 3, 2011*

**math**

find the perimeter and area of a right triangle if 1 leg measures 10 ft. and the other leg measures 24ft. show all work please.

*July 3, 2011*

**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?

*July 3, 2011*

**math**

the pi is 3.14

*July 3, 2011*

**math**

i am confused??

*July 3, 2011*

**math**

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

*July 3, 2011*

**math**

i got that too! thank u :)

*July 3, 2011*

**math**

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

*July 3, 2011*

**math**

l * w right?

*July 3, 2011*

**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.

*July 3, 2011*

**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?

*June 19, 2011*

**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 ?

*June 7, 2011*

**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?

*May 29, 2011*

**english**

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

*May 17, 2011*

**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...

*May 10, 2011*

**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 ...

*May 9, 2011*

**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...

*May 6, 2011*

**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...

*April 27, 2011*

**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 ...

*April 17, 2011*

**chemistry**

5.00 atm

*March 31, 2011*

**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?

*March 26, 2011*

**pre calc**

lnX + ln2 = 3

*March 24, 2011*

**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...

*March 17, 2011*

**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...

*March 17, 2011*

**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 ...

*March 17, 2011*

**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...

*March 14, 2011*

**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?

*March 3, 2011*

**chemistry**

Sorry the 18.02 is for water.

*March 3, 2011*

**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

*March 3, 2011*

**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 ...

*March 3, 2011*

**Organic Chemistry**

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

*March 3, 2011*

**math**

21girls to 15boys

*February 14, 2011*

**math**

Yes, thank you for thw awswers to my homework.

*February 9, 2011*

**math**

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

*February 9, 2011*

**physics**

M*9.8*sin23=540 M*9.8=540/sin23 =1382.02 M=1382.02/9.8 =141.02kg M=141.02kg

*February 3, 2011*

**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?

*February 1, 2011*

**eth/125**

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

*January 31, 2011*

**Math**

I still don't get it..?

*January 31, 2011*

**Math**

24 - 20 = 4

*January 31, 2011*

**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. :(

*January 31, 2011*

**Math**

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

*January 31, 2011*

**Math**

Thanks so much!! :)

*January 26, 2011*

**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?

*January 26, 2011*

**Writing**

What is the effect of smoking near others?

*January 25, 2011*

**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

*January 15, 2011*

**spelling**

what is the analogy for thorn

*January 11, 2011*

**math**

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

*January 8, 2011*

**science**

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

*January 4, 2011*

**Algebra 1**

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

*January 4, 2011*

**chemistry**

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

*December 15, 2010*

**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.)

*December 9, 2010*

**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!

*November 15, 2010*

**chemistry**

oops sorry.. did not mean to post this twice

*November 15, 2010*

**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?

*November 15, 2010*

**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?

*November 15, 2010*

**Chemistry**

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

*November 9, 2010*

**spanish **

yo bebo mucha agua..is this right?

*November 1, 2010*

**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

*October 28, 2010*

**science**

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

*October 24, 2010*

**Thermochemistry**

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

*October 18, 2010*

**Math**

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

*October 13, 2010*

**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

*October 12, 2010*

**chemistry**

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

*October 11, 2010*

**3rd grade math (array)**

write two ways to break apart each array

*October 7, 2010*

**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.

*October 5, 2010*

**math**

How do you write a number in expanded form?

*September 30, 2010*

**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 ...

*September 16, 2010*

**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?

*September 13, 2010*

**physics**

thank you very much

*September 1, 2010*

**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?

*September 1, 2010*

**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?

*August 26, 2010*

**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...

*August 24, 2010*

**Math**

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

*July 20, 2010*