Friday

August 26, 2016
Total # Posts: 1,121

**science**

How many atoms of carbon are needed to produce 0.45 mol Al? 3C + 2Al2O3 4Al + 3CO2 A. 2.6 × 1026 atoms B. 9.7 × 1024 atoms C. 3.0 × 1022 atoms D. 2.0 × 1023 atoms
*August 19, 2016*

**science**

Which of the following is an example of heterogeneous catalysis? A. Ethylene and hydrogen gases are adsorbed onto the surface of a metal catalyst to accelerate the formation of ethane. B. An enzyme catalyzes a biochemical reaction that produces the alcohol and CO2 gas in beer...
*August 18, 2016*

**science**

How would the fraction of successful collisions change with an increase in reaction temperature? A. The fraction of successful collisions would decrease. B. The fraction of successful collisions would remain unchanged. C. The fraction of successful collisions would increase. D...
*August 18, 2016*

**science**

What order is the radioactive decay of carbon-14, an unstable isotope of carbon? A. Third order B. Second order C. Zero order D. First order
*August 18, 2016*

**Math**

How do you solve 4x + 3.0 = -4x + 2.6?
*August 9, 2016*

**maths **

approximate the solutions (to three decimal places) of the given equation in the interval square bracket 0, 2π) sin 2x + 1.5 cos x = 0
*July 11, 2016*

**calculus**

Find the exact value of the given expression. (tan17pi/12 - tan pi/4) / (1+tan 17pi/12 tan pi/4) can you help with this? i got the answer 1/ squareroot 3
*July 11, 2016*

**math**

so would that be tan (8x)?
*July 11, 2016*

**calculus**

I did but it isn't one of my answer options. The options are a. (squareroot 3 - 1) / 2 squareroot 2 b. (squareroot 3 + 1) / 2 squareroot 2 c. (- squareroot 3 + 1) / 2 squareroot 2 d. (- squareroot 3 - 1) / 2 squareroot 2
*July 11, 2016*

**calculus**

Find the exact value of the given expression using a sum or difference formula. sin 345° Can you help with this? I got 1/4 (squareroot 2 - square root 6)
*July 11, 2016*

**calculus**

is c the correct answer?
*July 11, 2016*

**calculus**

the months are a. march through september b. april through august c. march through august d. may through september e. april through august i think the answer is c
*July 11, 2016*

**calculus**

The monthly sales S (in hundreds of units) of baseball equipment for an Internet sporting goods site are approximated by S = 60.1 − 43.9 cos πt/ 6 where t is the time (in months), with t = 1 corresponding to January. Determine the months when sales exceed 7700 units...
*July 11, 2016*

**math **

Use a graphing utility to approximate the solutions (to three decimal places) of the given equation in the interval (-pi/2, pi/2) a. 1 b. –1 c. 1/2 d. 2 e. 0
*July 11, 2016*

**math **

Use a graphing utility to approximate the solutions (to three decimal places) of the given equation in the interval square bracket0, 2π) sin 2x + 1.5 cos x = 0 a. x = 1.624, 1.932, 5.776, 5.997 b. x = 1.055, 3.785, 4.652, 5.721 c. x = 1.101, 2.118, 3.982, 5.104 d. x = 1....
*July 11, 2016*

**Chemistry**

Given the following three electron configurations: 1s2 2s2 2p5 How many core electrons does this element have? A. 4 B. 5 C. 9 D. 2
*July 10, 2016*

**Chemistry**

Don't worry - I figured it out. It is Boron
*July 10, 2016*

**Chemistry**

Which of the following atoms would have the highest first ionization energy? A. Li B. Be C. Na D. Mg
*July 10, 2016*

**Algebra**

sue can shovel snow from her driveway in 60 minutes. Tom can do the same job in 35 minutes. how long would it take Sue and Tom to shovel the driveway if they work together?
*July 7, 2016*

**Math**

find a rational function that satisfies the given conditions vertical asymptotes x=-6,x=7 horizontal asymptotes y=10/9 x intercepts (6,0)
*July 6, 2016*

**Chemistry**

Calculate the pH of a buffered solution prepared from 0.25 mol KF and 0.75 HF after the addition of 0.05 mol of NaOH (assume a 1.0 L volume of solution) I get that i need to use two seperate ice tables, but i don't really understand how to go about doing that?
*May 12, 2016*

**social studies**

I mean a
*May 4, 2016*

**social studies**

which of these is an example of entrepreneurs malia starts selling jewelry she made in an online store liam found a summer job walking dogs in his neighborhood pavel worked hard to learn how to speak a foreign language Ophelia took classes in painting and drawing at an art ...
*May 4, 2016*

**social studies**

what is the most likely effect on a person's income if he or she has little education and few skills? A. the person's income will vary greatly. B. the person's will earn a high income. C. the person's income will decline over time. D. the person's will earn...
*May 4, 2016*

**social studies**

Which of these events would most likely lead to a rise in interest rates for home mortgages? The prices of homes for sale in a certain city rise by a great deal. Many new lenders begin offering home mortgages. Home sales increase greatly for several months in a row. The ...
*May 4, 2016*

**social studies**

thank you
*May 4, 2016*

**social studies**

1. c 2. b
*May 4, 2016*

**social studies**

1.when prices at a high rate, it is called? interest rate net export inflation taxes 2. which of these is not a purpose of money? store of value producers of resources unit of account medium of exchange
*May 4, 2016*

**algebra PLEASE HELP ASAP**

1.d 2.d 3.c 4.a
*May 3, 2016*

**language arts**

1. c. 3a. c
*May 3, 2016*

**language arts**

The passage is The Miracle Worker by William Gibson. Kate. Miss Annie. Annie. No. Kate (a pause). It’s a very special day. Annie (grimly). It will be, when I give in to that. [She tries to disengage HELEN’S hand; KATE lays hers on ANNIE’S.] Kate. Please. I’...
*May 3, 2016*

**English**

answers someone please!
*May 2, 2016*

**Art**

Peggie is right but number 10 is B :):):):):)
*May 1, 2016*

**Physics**

A dam 143 m above a hydroelectric generator holds 1.6 x 1015 L of water. If the generator is taken to be at a height of 0 m, how much potential energy is stored in the dam?
*April 29, 2016*

**Math**

The answer is not 3. This is how you do it: Vanilla Chocolate Cake Cones - Strawberry Pistachio Coffee Vanilla Chocolate Waffle Cones - Strawberry Pistachio Coffee Vanilla Chocolate Cups - Strawberry Pistachio Coffee This shows that there is 4 outcomes per cone/cups, therefore...
*April 29, 2016*

**7th Grade Math**

That is correct :)
*April 28, 2016*

**Physics**

A block of weight 3.8 N is launched up a 30 ∘ inclined plane of length 2.20 m by a spring with spring constant 2.40 kN/m and maximum compression 0.10 m . The coefficient of kinetic friction is 0.50. f so, how much kinetic energy does it have there; if not, how close to ...
*April 26, 2016*

**Physics**

A car moving at 37 km/h negotiates a 140 m -radius banked turn designed for 60 km/h . What coefficient of friction is needed to keep the car on the road?
*April 25, 2016*

**Physics**

You step into an elevator, and it accelerates to a downward speed of 8.2 m/s in 2.2 s . How does your apparent weight during this acceleration time compare with your actual weight?
*April 25, 2016*

**algebra **

A mortgage broker purchased two trust deeds for a total of $290,000. One trust deed earns 9% simple annual interest, and the second one earns 12% simple annual interest. If the total annual interest from the two trust deeds is $31,500, what was the purchase price of each ...
*April 20, 2016*

**Chemistry**

The equation for fermentation of glucose to alcohol and carbon dioxide is C6H12O6= 2C2H5OH + 2CO2 The enthalpy for the reaction is -67kj. Is the reaction endothermic or exothermic? Is the heat energy absorbed or released as the reaction occurs? I think its endothermic but im ...
*April 20, 2016*

**MATH **

1.) which order pair would be plotted y starting from the origin and moving 0.25 units left and then 3 units up?
*April 18, 2016*

**L.A.**

THE ANSWERS ARE 1- B 2- A 3- D sally made me get them wrong becuase she put them in the wrong order so read CAREFULLY!!!!!!!!!!!!
*April 15, 2016*

**L.A.**

The answers are 1-
*April 15, 2016*

**math**

thank you
*April 12, 2016*

**math**

help teacherwriter or ms.sue
*April 12, 2016*

**math**

Ms. Sue
*April 12, 2016*

**math**

sarah owns a small business there was a loss of 19 dollars on thursday and a loss of 12 dollars on friday on saturday there was a profit of 15 dollars find the total profit or loss of the four days A- $35 loss B- $ 19 profit C- $ 27 loss D- $ 57 loss my answer A is it right??
*April 12, 2016*

**language arts**

ohh ok thank you Ms. Sue
*April 8, 2016*

**language arts**

Ms.Sue
*April 8, 2016*

**language arts**

Here is another one King Azaz is ruler of the realm of letters and words. Azaz and his brother argue over which is more important—numbers or letters, and they banish the princesses Rhyme and Reason. Once he realizes the foolishness of his squabble, King Azaz sends Milo to...
*April 8, 2016*

**language arts**

Ms.Sue I this right???
*April 8, 2016*

**language arts**

Milo The main character, Milo is a little boy who goes through all of his days in a state of horrible boredom. This routine changes when Milo takes a trip through the mysterious make-believe tollbooth that appears in his bedroom one day.
*April 8, 2016*

**language arts**

ms.sue
*April 8, 2016*

**language arts**

one of the important elements of drama is dialogue, the words spoken by the characters choose one character from the act 1 of the phantom tollbooth which a paragraph in which you describe three things about the character that are revealed by the sorts of things he says support...
*April 8, 2016*

**Physics**

You throw a baseball at a 45∘ angle to the horizontal, aiming at a friend who's sitting in a tree a distance h above level ground. At the instant you throw your ball, your friend drops another ball. The two balls will collide, no matter what your ball's initial ...
*April 8, 2016*

**Physics**

An arrow fired horizontally at 45 m/s travels 26 m horizontally. From what height was it fired?
*April 8, 2016*

**Physics**

A flock of geese is attempting to migrate due south, but the wind is blowing from the west at 5.4 m/s . If the birds can fly at 7.9 m/s relative to the air, what direction should they head?
*April 8, 2016*

**Physics**

The position of an object as a function of time is r⃗ =(3.2t+ 1.8 t2)i^+(1.7t− 2.4 t2)j^m, where t is the time in seconds. Find the object’s magnitude of the acceleration. What is the direction of the acceleration?
*April 8, 2016*

**Physics**

An ice skater is gliding along at 2.1 m/s , when she undergoes an acceleration of magnitude 1.4 m/s2 for 3.0 s. After that she's moving at 6.3 m/s . Find the angle between her acceleration vector and her initial velocity vector.
*April 8, 2016*

**Physics**

You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 88 km/h collided with a slower train traveling in the same direction at 22 km/h . Your job is to determine the relative speed of the collision, to ...
*April 8, 2016*

**Physics**

You can run 8.0 m/s , 20% faster than your brother. How much head start should you give him in order to have a tie race over 90 m ?
*April 8, 2016*

**Physics**

You allow yourself 34 min to drive 26 mi to the airport, but you're caught in heavy traffic and average only 15 mi/h for the first 13 min . What must your average speed be on the rest of the trip if you're to make your flight?
*April 8, 2016*

**Physics**

A rock is thrown directly upward from the edge of the roof of a building that is 40.2 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects of air resistance. With what speed was the...
*April 8, 2016*

**Physics**

In a chase scene, a movie stuntman runs horizontally off the flat roof of one building and lands on another roof 2.0 m lower. If the gap between the buildings is 4.8 m wide, how fast must he run to cross the gap?
*April 8, 2016*

**Math**

Also the pathway is the same width all the way around the garden.
*April 1, 2016*

**Math**

A garden measuring 12m by 16m is to have a pedestrian pathway installed all around it. The pathway and the garden have a total area of 285m^2. What will be the width of the pathway? (Please explain as you go)
*April 1, 2016*

**physic**

A concave makeup mirror is designed so that a person 29 cm in front of it sees an upright image magnified by a factor of two. What is the radius of curvature of the mirror?
*March 14, 2016*

**Math**

Thank you!
*February 25, 2016*

**Math**

1. Hannah drew a pattern using only equilateral triangles. Which of the following statements about the angles is an equilateral triangle is true? A. The measurement of each angle is 60 degrees** B. The measurement of each angle is 120 degrees C. The measurement of one angle is...
*February 25, 2016*

**Algebra**

Tom and Jerry are working together to weed the garden. Working together it takes them 2 hours and 24 minutes. If it takes Tom two hours longer to finish the job alone than it takes Jerry to finish the job alone, how long would it take each of them to weed the garden if they ...
*February 18, 2016*

**Science**

The answers are right they are 1- A 2- D 3- C 4- A
*February 18, 2016*

**math fractions and decimals**

which is more 0.85 or 7/9
*January 1, 2016*

**Math**

Thank you so so so much @Damon, ur a lifesaver. :D
*December 16, 2015*

**Math **

So this is a math quiz I took a few months ago and they said I can redo it, but I have to explain why the correct answer is correct... And idk. Which equation represents 15 more than r is 61? The answer is r + 15 = 61 but idk why? What is the value of 4^2 -2 (3 x 5 + 1) The ...
*December 16, 2015*

**Math **

In a shipment of 400 parts, 15 were found to be defective. How many defective parts should be expected in a shipment of 1000 parts?
*December 10, 2015*

**Math**

Carol spends 15 hours every 2 weeks practicing her culinary skills. How many hours does she practice in 5 weeks ?
*December 10, 2015*

**Math**

I am not sure what formula do j use
*December 10, 2015*

**Math**

Mary can read 20 pages in 30 minutes. How long would it take her to read 160 page book? Write your answer in hours and minutes .
*December 10, 2015*

**Math**

A worker can complete the assembly of 12 tape players in 4 hours. At this rate, how many can the worker complete in a 40 hour work week ?
*December 10, 2015*

**Math**

The ratio of boys to girls in a class is 6 to 5. How many girl students are there if there are 30 boys?
*December 10, 2015*

**math**

The production costs for 4 lollies is 9.55 strawberry, 8.70 orange, 9.99 grape, 6.30 bubblegum. The packaging is the same for all lollies at 5.00 per lolly. Owners like to add 25% markup on their stock. Calculate the retail price of the strawberry lolly. Is packaging included ...
*November 26, 2015*

**Chem**

How many liters of H2 gas can be produced at 0 ∘C and 1.00 atm (STP) from 48.0 g of Zn? Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)
*November 9, 2015*

**Math**

A,B,D
*November 9, 2015*

**science**

will the air above a surface that has a high albedo be warmer or cooler than the air above a surface that has a low albedo? Low.
*November 5, 2015*

**earth science**

briefly explain how earths atmosphere heated? Energy is transferred between the earth's surface and the atmosphere via conduction, convection, and radiation. Conduction is the process by which heat energy is transmitted through contact with neighboring molecules
*November 5, 2015*

**math**

I need to know how many yards do they need to gain on the fourth down to have 10 yard gain from there starting position
*November 3, 2015*

**sience**

the answer is B
*November 2, 2015*

**Calculus**

The consumer demand equation for tissues is given by q = (97 − p)2, where p is the price per case of tissues and q is the demand in weekly sales. (a) Determine the price elasticity of demand E when the price is set at $26. (Round your answer to three decimal places.) E =...
*October 28, 2015*

**math**

If 3 people walk around a track, one takes 6 min, one takes 9 min and one takes 12 min. How long til they meet at the start line?
*October 26, 2015*

**Chemistry**

How many electrons in an atom could have these sets of quantum numbers? n=3 n=5 , l=2 n=7 , l=3 , ml=-1
*October 25, 2015*

**Science**

THANKS ANON!!!!!
*October 21, 2015*

**Probability/ Stats**

Assume that it is known that 95 percent of the launching of satellites into orbit are successful. What is the probability that in the next four launching there will be. Not sure where to start. can someone help me with steps on how to find the answer?
*October 19, 2015*

**Statistics**

A family consists of ten children. Assuming that the sexes are equally probable, find the expected number of boys in the family. What is the probability that the expected number of boys will not occur? (Not sure where to start) I got partial credit and I answered 5 (Question ...
*October 19, 2015*

**chemistry**

Write the net ionic equation for the following molecular equation. HNO3 is a strong electrolyte. NaNO2(aq) + HNO3(aq)--> NaNO3(aq) + HNO2(aq) HNO2 is a weak electrolyte.
*September 27, 2015*

**Math**

Salon an was told the written paper on his science experiment should express measurements in liters. Which shows how to calculate the number of liters he used if he used 5 cups of water
*September 24, 2015*

**Biology**

Which of the following depends on bacteria?
*September 9, 2015*

**vocabulary**

the couple ordered for hors d'oeuvres at the wedding
*July 11, 2015*

**stats**

The mean tax-return preparation fee H&R Block charged retail customers last year was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. Round your answers to four decimal...
*June 26, 2015*