Tuesday

January 24, 2017
Total # Posts: 113

**Schuelke**

A sample of an ore of iron, hematite, is 70% Fe2O3. How much iron is there in 5 kilograms of the ore? Answer in units of g.

*January 23, 2017*

**chemistry**

Write an equation for the reaction that take place in hydrogen sulphide gas when bubbled through a solution of zinc nitrate

*January 4, 2017*

**chemistry**

What would be made if hydrogen sulphide gas was bubbled through a solution of zinc nitrate

*January 4, 2017*

**Maths**

Analyse the following equation using rotational axis 4x^2 + 9y^2 - 8x + 36y + 4 = 0

*December 17, 2016*

**Math**

Sam's cat can run 45 feet per second about how fast is that in miles per hour

*November 9, 2016*

**ga history**

What was the name of Spain's first permanent colony in the New World

*November 1, 2016*

**Math**

A boat is 300m away from the foot of a cliff. The angle of elevation from the boat to the top of the cliff is 16 degrees. a) Determine the height of the cliff to the nearest meter. b) If the boat sails 75 m closer to the cliff, determine , to the nearest degree, the new angle ...

*July 27, 2016*

**Math**

A boat is 300m away from the foot of a cliff. The angle of elevation from the boat to the top of the cliff is 16 degrees. a) Determine the height of the cliff to the nearest meter. b) If the boat sails 75 m closer to the cliff, determine , to the nearest degree, the new angle ...

*July 27, 2016*

**PHYSICS**

Explain the statement the capacitance of a capacitor is 5microfarads

*June 4, 2016*

**Math-reasoning**

A farmer wants to build a straight fence with a post every 7 feet. Each end has a post. For a fence that is 49 feet long, how many posts will the farmer need? Describe the quantities given Tell how you can show the relationships in the problem Solve and explain your reasoning ...

*May 23, 2016*

**Math**

Determine to 3 decimal places. (Please explain as you go, thank you) 7^0.4

*May 9, 2016*

**Math**

Determine to 3 decimal places. 7^0.4 (please explain as you go, thank you)

*May 9, 2016*

**Math-soh cah toa**

Thank you!!

*April 7, 2016*

**Math-soh cah toa**

A bridge is 140m long.From the ends of the bridge, the angles of depression of a point on the river under the bridge is 41° and 48°. How high is the bridge above the river to the nearest meter. ( I know the answer is 68m, I just need to know how to get that, please ...

*April 7, 2016*

**Chem**

A student reacts 57g of salicylic acid with 21 mL of acetic anhydride producing 10.5g of acetyl salicylic acid. What is the percent yield of the reaction?

*March 20, 2016*

**math**

Ishaan works at a nearby electronics store. He makes a commission of 15% on everything he sells. If he sells a television for $392.00, how much money does Ishaan make in commission?

*December 6, 2015*

**science**

in what stage of meiosis is there single chromosomes

*December 1, 2015*

**science**

in what stage of meiosis is there single chromosomes

*December 1, 2015*

**math**

You’re piloting an airplane. To prepare for landing, you change the plane’s altitude from a feet to c feet. What expression always represents the distance between the two altitudes?

*November 8, 2015*

**science**

Thank you :)

*November 1, 2015*

**science**

What are the major phases of the cell cycle?

*November 1, 2015*

**chemistry**

describe how you can prepare 500cm of 0.1 of hydrochloric acid from commercial Hcl of density 1-18g/cm and the percentage by mass 37%

*March 13, 2015*

**Algebra 2**

The third and sixth terms of a geometric sequence are -75 and -9375 respectively. Find the first term, the common ratio, and an explicit rule for the nth term.

*February 19, 2015*

**1 step and 2 step equations**

Y+15-8.95 Y=6.05?? -62=y-87 Y=25? -y/7=18 14z=56

*January 26, 2015*

**math**

The lists below show the players who will be competing in two different games.Both games are pure chance;it is equally probable for any player to with either game. Game 1:Jen,Fred,Monique,Darryn Game 2:Craig,Sarah,Yvonne,Allan What is the probability that Craig will win both ...

*January 21, 2015*

**math**

A bag contains the following marbles:6 red,4 orange,3 yellow,2 blue and 5 green. You choose a marble at random and do not replace it. Then you select another marble. P(red,then blue)3/95 P(orange,then blue) 2/95 P(blue,then yellow) 3/190 P(red,then yellow) 9/190 P(blue,then ...

*January 13, 2015*

**algebra**

Sharon has 24 colored paper clips in her desk drawer:12 are red, 8 are yellow, and 4 are blue. She also has 28 pushpins in her drawer: 11 are white, 14 are orange, and 3 are green. 1. If she picks one paper clip, what is the probability that it will be either blue or yellow.4/...

*January 13, 2015*

**math**

The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington Bridge in New York ...

*January 12, 2015*

**Math stem question**

The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington Bridge in New York ...

*January 12, 2015*

**Math**

Suppose you purchase 3 identical T-shirts and a hat. The hat costs $19.75 and you spend $56.50 in all. How much does each T-shirt cost? My answer 56.50- 19.75= 36.75 36.75/3=12.25 each

*January 12, 2015*

**Math**

Thanks

*January 12, 2015*

**Math**

The marsh family took a vacation that covered a total distance of 1356 miles. The return trip was 284 miles shorter than the first part of the trip. How long was the return trip? My answer is 1356-284= 1072

*January 12, 2015*

**Math**

Thanks a lot

*January 12, 2015*

**Math**

I put 8(1+6x) Is this right

*January 12, 2015*

**Math**

Factor 48x+8

*January 12, 2015*

**7th grade math honors**

Thanks also

*January 12, 2015*

**7th grade math honors**

The total cost for renting a kayak is represented as 25+5.50m. What is the constant in the expression 25+5.50m? Show work.

*January 12, 2015*

**Can you check my Math answer please?**

According to the first derivative test, a differentiable function must have a relative minimum between any two relative maxima. True.

*December 9, 2014*

**math**

write the following square root in form a root b where a and b are intergers and b has the least value possible . root 45=

*December 4, 2014*

**Math help**

multiply -(-5-p)(5+p)

*December 2, 2014*

**math help**

multiply -P(P-Q+5)

*December 2, 2014*

**Math**

150 more boys enrolled that year.

*September 6, 2014*

**Trig**

1/2

*May 24, 2014*

**Math**

No clue

*February 5, 2014*

**physical science**

no

*January 9, 2014*

**math**

whats the ansewr

*December 2, 2013*

**world geography**

they are frozen

*July 22, 2013*

**physics**

The electric potential in a certain region is V = a x2 + b x + c, where a = 14 V/m2, b = −19 V/m, and c = 61 V. Determine the position where the electric field is zero. Answer in units of m Please help!

*July 9, 2013*

**um reviewing old subjects .. Linear Equations**

Math.. and i don't understand this... plz go throw steps w me.. Like ex: 2 complementary angles a 24 degrees different. How much does each angle measure? Equation1: Equation: Method1: Method2:

*April 29, 2013*

**Physical Science**

recks the sled

*October 11, 2012*

**6th grade science**

I believe answer B or C would be correct. I hope this helps!

*September 16, 2012*

**physics....**

Suppose that the inside length of a microwave oven is 30 cm. If the length of a microwave oven is one half of the wavelength of microwaves used by the oven, find the frequency of the microwaves used in the oven. What is the equation that relates the three of these???

*June 13, 2012*

**physics....**

1) Yellow light that has a wavelength of 560 nm passes through two narrow slits that are 0.300 mm apart. An interference pattern is produced on a screen 160 cm distant. What is the location of the first-order maximum? 2) A communication satellite is orbiting 36 000 km above ...

*June 12, 2012*

**physics....**

Make a list of the characteristics of light that a model should explain: rectilinear propagation, reflection, refraction, partial reflection, partial refraction, dispersion, and diffraction. Briefly discuss how the wave model of light and the particle model of light explain ...

*June 2, 2012*

**physics....**

1) Yellow light is incident on a single-slit 0.0315 mm wide. On a screen 70.0 cm away, a dark band appears 13.0 mm from the centre of the bright central band. Calculate the wavelength of the light.

*June 2, 2012*

**physics....**

The universal law of gravitation describes the force of gravity between two bodies. What does it say about the strength of the gravitational field? How does the size of the object affect the use of the gravitational field equation? i know that the gravitational field strength ...

*June 1, 2012*

**physics....**

1) Thin films, such as soap bubbles or gasoline on water, often have a multi-coloured appearance that sometimes changes while you are watching. Explain the multi-coloured appearance of these films and why their appearance changes with time. 2) Yellow light is incident on a ...

*May 31, 2012*

**algebra 2 help please**

0.89

*May 21, 2012*

**track and field**

is a speed of 6.5 on a tredmill for five minutes equal to a good mark for a seventh grade girl to get 67 seconds in the 4 by 400?

*May 12, 2012*

**Science**

Explain how fast and slow wind speeds are created.

*January 31, 2012*

**math**

Ms.Sue: don't understand question JL:37-2=39,then-59=10 same as (37+-2=39)-59=10

*January 31, 2012*

**math**

what is the question

*January 31, 2012*

**physical science**

is it possible for people of different masses to have the same power output? Explain

*November 29, 2011*

**Algebra word problem**

Gives me the algebraic expression for each statement Sandra made 3 more batches of cookies than Tommy

*November 8, 2011*

**physics!**

how much work is done by each force acting on vacuum cleaner as it is pulled horizontally 3 m at a constant speed by a force of 50 N at an angle of 30degrees above the horizontal?

*October 26, 2011*

**physics!**

great thank you!!!!

*October 26, 2011*

**physics!**

how much work is done by each force acting on vacuum cleaner as it is pulled horizontally 3 m at a constant speed by a force of 50 N at an angle of 30degrees above the horizontal?

*October 26, 2011*

**algebra**

A rectangle with sides 8 cm and 6 cm and one with sides 10 cm and 9 cm. Find the ratio of the perimeter and the areas of each pair of figures.

*April 26, 2011*

**math**

What is the value of cos 138 if the cosin 42 = 0.7431

*April 20, 2011*

**chemistry**

In a mixture of ammonia an chlorine with excess ammonia what is the product

*March 28, 2011*

**physics**

2990

*March 12, 2011*

**Math**

i had the same question on my pre-al test i couldn't figure it on when i was correcting it so i googled it and here it is! thanks guys!

*January 9, 2011*

**Science**

How much rope will be needed to lift a load 48m in a single fixed pulley system if the effort is 63n and why

*January 6, 2011*

**Science**

I need help writing a poem about plant cells ,or i can write a letter.It has to have 3-4 facts and has to be done this coming wed. ....I am in 6th grade can someone please help?

*December 17, 2010*

**Calculus**

Let f(x)=1x^3+2.5x+3. In this problem you will estimate f'(-3) by computing the average rate of change of f(x)over a small interval. Round your answers to three decimal places. 1. First choose the interval of length .1 with -3 being the left endpoint of the interval. Then...

*October 5, 2010*

**precalc. please help:)**

thanks that makes alot of sense:)

*September 27, 2009*

**precalc. please help:)**

(square root y-3)^2=(1-square root 2y-4)^2. how do i do this???? i am clueless, pleaseeee help!!!! i^-7. how do I do this please describe! thanks for your time and help, I really appreciate it:)

*September 27, 2009*

**precalculus**

The cost of a fill on acrylic nails is a function of how many broken nails. MArtha is charged $34 for 5 broken nails, while Grace is charged $26 for 1 broken nail. a)express the total cost as a fucntion of the number of broken nails. b)What is the slpe of this fucntion and ...

*September 15, 2009*

**precalculus**

write an equation in general form... the perpendicular bisector of the segment with endpoints at (2,-1) and (4,-5). I found the slope and then found the mid point and wrote to the equation and got X-2Y=3. But the answer is X-2Y=9...any help???

*September 15, 2009*

**math**

i need help on answering this 1 7/8 1 1/2 and 7/8 and and estimated. can you help plx need it............lol

*July 8, 2009*

**Math**

how did you get 8? I keep getting 16 for x.

*April 14, 2009*

**8th grade**

Need some info on the Battle of New Orleans I can't find it in my book

*March 9, 2009*

**trig**

give 3 different coterminal angles in radians to: pie/3 i changed that to degree and got 60 degress, but now i'm stuck...i don't know what to do

*February 2, 2009*

**trig**

thanks so mcuh

*February 2, 2009*

**trig**

is this right... a) give reference angle -200=20 degrees reference angle??

*February 2, 2009*

**trig**

converting degrees to radians. a) 95 degrees i did 95/180=19/36 then i did 19 pie/36. and i got 1.7. is that right if not can someone please explain! thanks so much

*February 2, 2009*

**physics**

a person is standing on a scale in an elevator that slowing down at a rate of 4m/s/s. the elevator is moving upward. if the persons mass is 80 kg what does the scale read during the period of time that the levator is accelerating?

*January 21, 2009*

**physics**

a bus moving at 20m/s slows at a rate of 4m/s each second. how far does it travel while braking. i found the time which was 5 seconds. A car accelerates from rest at a rate of 5 m/s/s for a period of 4.2 seconds and then moves at a constant speed for 8 seconds more. how far ...

*January 21, 2009*

**math help please**

two cards are dealt in succession from a standard deck of cards. find the probability that the first card is a diamond or a king. probability that the second card is red given that the first card was a heart. if two dice are rolled, what is the probability of rolling at least ...

*January 19, 2009*

**math help please**

i still don't under the simplifying one cause reiny told me that (x+2)! was (x+2) (x+1) but howcome you are telling me that you go up in factorial. i though factorial goes down

*January 19, 2009*

**math help please**

two cards are dealt in succession from a standard deck of cards. what is the probability that the second card is red give that the first card was a heart. so i do p(R/H), then i know you go R*H/H. but how do i get the probability please explain! thanks. if 2 dice are rolled, ...

*January 19, 2009*

**math**

thanks!

*January 18, 2009*

**math**

in the expansion of (x^2+3)^10 what is the coefficient of the term containing x^16. I did 10c4 * 3. But i am not getting the correct answer. can someone please show me how to do this. thanks for your time!

*January 18, 2009*

**math**

i have no idea how to do the last one

*January 18, 2009*

**math**

How many 4-letter words can be formed by slection four letters from the word UNIFORM? I don't understand how to do this at all. I know the answer is 840 but why? i have no idea how to simplify this... can anyone help? (x+3)!/x+3 (x-2)!/x!

*January 18, 2009*

**math**

you are given an exam with only 9 questions. if each question has 4 choices, how many different possible answers can you have for the entire exam?

*January 18, 2009*

**MATH PLEASEEEEE**

thanks for your time and your help!

*January 18, 2009*

**MATH PLEASEEEEE**

A)If a license plate consists of 2 letters followed by 3 digits or 3 letters followed by 2 digits, how many license plates can be created? B)You are given an exam with only 9 questions. if each question has 4 choices, howmany different possible answers can you have for the ...

*January 18, 2009*

**To Kennedy: math**

please will you put my post up so doc. bob can help me yoo

*January 18, 2009*