Tuesday

July 29, 2014

July 29, 2014

Total # Posts: 70,609

**Precalculus**

I know I posted this question already ,but I posted the wrong one.... Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' INTERSECT C {?} I meant INTERSECT not union! My answer: 4,8,12

**Chemistry**

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

**Chemistry**

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

**Math**

a random sample of 28 patients across the country had an average cost of 5250 with a standard deviation of 629.at a= 0.025 can it be concluded that the mean is less than 5400

**Help**

If upon retirement in 20 years Greg plans to invest 800,000 in a fund that earns 4 percent, What is the maximum annual withdrawal he can make over the following 15 years

**grammar**

it should be related to a fantastic voyage --

**Precalculus**

For this problem I drew a Venn diagram.. Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' union C {?} My answer: The apostrophe stands for negation! According to my Venn diagram, that me...

**science: biology**

they eat herbivores

**science: biology**

The hyena is a carnivore. Justin claims that hyenas need plants to survive, but Kaden says that they don't because they only eat meat. Who is correct and why?

**math ratio**

a:b = 10:15 b:c = 15:18 c:d = 18:48 a:b:c:d = 10:15:18:48

**math**

between 8:00 and 8:30, A has gone 15 km The speed difference B-A = 15 km/hr So, since B is 15km behind A at 8:30, it will take 1 hour to make up the distance.

**CALCULUS**

pi, not pai dx/dt = 12sin^2(t)cos(t) dy/dt = -21cos^2(t)sin(t) dx/dt and dy/dt are both zero when sin(2t)=0, or at multiples of pi/2. So, the open intervals are (0,pi/2),(pi/2,pi),(pi/3pi/2),(3pi/2,2pi). The graph bears this out: enter parametric plot x=4sin^3(t), y=7cos^3(t) ...

**College algebra**

This year the state highway department in Montana purchased 276 identical trucks for official use. The purchased price was 5,680,088. Due to budget shortfall next year the department plans to purchase only 69 cars and 119 trucks. It will be charged the same price for each car ...

**informal logic **

To criticize a deductive argument logically, one might:

**ag 1**

The average daily high temperature for the month of may in ocaia Florida is appromaimated by thee function. F(n)=0.2n+80. Where n is the day of the month

**grammer**

My sister and I share a three year age gap as she is twenty one while I am eighteen. how to improve this sentence

**grammer **

In addition to having common personality traits with my mother, I also play the same two instruments my mother did when she was young. How to improve this sentence?

**Precalculus**

Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' union C {?} My answer: 1,4,5,6,7,8,9,10,11,12,13,14,15 union 4,8,12 {4,8,12}

**Calculus Help Please Urgent!!!**

a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ??? Then improve your estimate by using six rectangles. R6= ??? Sketch the curve and the approximating rectangles for R3 and R6? b) Repeat part (a) using left e...

**English help**

I'm writing an essay about something that is worth dying for. For me, something that is worth dying for is my religion. How would I write it about religion? Need help!!

**chemistry**

how many grams of HCL is needed to produce 200 grams of hydrogen?

**Science**

7.D 8.C

**Science**

my answers: 1.A 2.C 3.D 4.B 5.B 6.A 7.DC 8.

**Science**

1. If the net force on an object is O N, the forces are considered unbalanced true false 2. Most people in the united states use feet and miles to measure distance in their everyday lives. why do scientist in the United States use meters to measure distance? Meters allow scien...

**Math **

I'm extemely lost at some point, how do you solve this equation by using the inverse of the coefficient matrix and by echelon method -x-8y=12 3x+24y=-36

**Language arts**

If you had to write a creative story what would it be about?

**finance**

If the average new home costs $ 275,000 today, how much will it cost in 10 years if the price increases by 5 percent each year?

**Math**

3.14x8=your answer Pie times the radius

**science**

Why are there usually more producer in an ecosystem than consumers? a). There is less energy available to the consumers. b). There is more energy available to the consumers. My answer is ( a ).

**physics**

A stone is dropped from the deck of the bridge. The sound of the splash reaches the deck 3 seconds later. If sound travels at 342 m/s in still air, how high is the deck of bridge above the water?

**Math**

(2 + sqrt 2)/(2 - sqrt 2) = (x)/(3 + sqrt 10) How to solve for x?

**Math**

Thanks, but can you please verify how you got the (2√5 + 5)? Because I thought that √5 * (2+√5) would be 2√25.

**Math**

(sqrt 5)/(2 - sqrt 5)

**chemistry urgent! **

what is the net ionic for these following balanced equations: 2(NH4)3PO4(aq) + 3Ba(OH)2(aq) -> Ba(PO4)2(s) + 6H2O(l) + 6NH3(g) 2HNO3(aq) + K2CO3(aq) -> H2O(l) + CO2(g) +2KNO3 NaF(aq) + HCl(aq) -> NaCl(aq) + HF(aq)

**Algebra 1**

Yes.

**business math**

On May 1, Emerson Fast bought 10 Manitoba On May 1, Emerson Fast bought 10 Manitoba Polar bonds with a coupon rate of 7.875%. The purchase price was $101. 375, and the commission was $8 per bond. Manitoba Polar bonds pay interest on April 1 and October 1. Polar bonds with a co...

**Algebra**

The formula.

**Algebra**

That's exactly what it said in the textbook.

**Algebra**

The equation r = (sqrt A)/(pi) gives the radius r of circle with area A. What is the radius of a circle with the given area? Write your answer as a simplified radical and as a decimal rounded to the nearest hundredth. a. 50 ft^2

**calculus help**

At time t=0, an astronaut stands on a platform 3 meters above the moon's surface and throws a rock directly upward with an initial velocity of 32 m/sec. if the acceleration due to gravity is 1.6 m/sec^2. a) find the equations of motion for the throwing of this rock. -1. a(...

**Math**

Please Help!!

**Math**

It doesn't make sense!!!

**Math**

I did 175.2 multiplied by 0.7134 then I rounded to get 125. So I dont get how to get the answer!!!

**Math**

52

**Math**

During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M=176-0.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended heart rate in beats per minute of 125? A.52 y...

**Math**

Solve the equation and write the answer in simplified radical form. n^2 - 2n + 1 = 5

**Math**

(16a)/(sqrt 6a^3)

**Math**

M=11*

**Math**

Find the value of the variables in the table: X= n, 4, 6, 10, 12. Y= 1, 9, m, 21, 25 n=0 Y=11?

**Algebra**

Can you explain how we do that? Also, the answer key says ab^2 sqrt abc.

**Algebra**

(sqrt a^3 b^5 c^3)

**Math**

1.Which explains why the sequence 216, 12, 2/3 is arithmetic or geometric? A.The sequence is geometric because it decreases by a factor of 6. B.The sequence is arithmetic because it decreases by a factor of 6 C.The sequence is geometric because it decreases by a factor of 1/18...

**Geometery help**

Well, you move 5 units right and 5 units up. So, move five units up from (4,5), which is (4,10).

**math**

a person was climbing on a building. He slips 1 m for every 5 metre he climbs up. If the building is 53 m high and he takes 5 seconds to climb 1 metre find the total time taken by him to get on the top of the building.

**math**

represent an equivalent fraction to 3/4 as 1)a fraction and 2)a picture

**environmental science**

What are some of The Blue Plains Water Advanced Wastewater Treatment Plant standards of

**trignometry**

Tan4x=4tanx(1-tan^x)/1-6tan^x+tan^^x ,prove

**Algebra **

When a polynomial is divided by x+3, the quotient is x^3+x^2-4 and the remainder is 8. Find the dividend?

**Algebra**

(√(2m)^-3)/(m^-1)

**Algebra **

When a polynomial is divided by x+3, the quotient is x^3+x^2-4 and the remainder is 8. Find the dividend?

**Calculus Help Please Urgent!!!**

At time t=0, an astronaut stands on a platform 3 meters above the moon's surface and throws a rock directly upward with an initial velocity of 32 m/sec. if the acceleration due to gravity is 1.6 m/sec^2. a) find the equations of motion for the throwing of this rock. b) how...

**chemistry**

13. A student mixes 100.0 mL of 0.500 M AgNO3 with 100.0 mL of 0.500 M CaCl2. (8 points) a. Write the balanced molecular equation for the reaction. b. Write the net I onic equation for the reaction. c. How many grams of precipitate will form? d. What is the concentration of Ag...

**Algebra**

Find the constant c such that the denominator divides evenly into the numerator. (x^4 - 3x^2 + c)/( x+6)

**Algebra**

(√5a^-2)/(√10a^-1)

**Music**

So, I have to split a song into its form, like ABAA, ABBA, and so on. I need help with doing that to the song "Wake Me Up" by Avicii. I get confused whenever I try to. Please help me?

**Math**

360(degrees in a circle) 40(given) so 360/40=9 Multiply that by two(because theres two pizzas) so 18 people.

**Math - Answer Check**

Jeff hiked 2/3 distance from Lookout Point to Eagle Station then stopped for lunch. How far had he hiked? Lookout Point to Eagle Station: 2 1/10 I got 1 13/30 but it's not an answer choice.

**Grammar**

There are no such things as unicorns or ghosts. There are no such things as unicorns nor ghosts. Which sentence is correct?

**Math**

Thanks! I get it completely now :).

**Math**

How did √(3f^3) become f√(3f)? That's the part I'm confused about.

**Math**

How to simplify? (√3)/(√f^-3)

**science**

The link works for me. Anyway, if it does actually lead you to the homepage, then just search about the formation of the Andes Mountains on your own.

**Algebra**

How did you get the 1/(f√f)?

**Algebra**

How to simplify? (√3)/(√f^-3)

**Chemistry**

How many grams of sodium acetate, NaC2H3O2, would have to be added to 5.00 L of 0.65 M acetic acid (pKa 4.74) to make the solution a buffer for pH 4.00?

**math**

how do you make a coordinate plane for the function of a person who weighs 130 pounds that burns 300 calories in 1 hour,600 calories in 2 hours,900 calories in 3 hours and 1200 calories in 4 hours

**Algebra**

That's okay, I figured it out.

**Algebra**

How to simplify: sqrt(3x^3)/(64x^2) The whole thing is under the radical.

**algebra**

What is the y-intercept for line A, considering these answers (0,1/2),(1/2,0), (0,-1) and (-1,0).

**algebra**

What is the slope of line A if the answers are -2, 1/2, -1/2 and 2.

**Algebra ll**

thank you, Steve :)

**Physics**

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

**math problem**

what is 4/5 of 230

**math**

transversal

**Chemistry**

What is the azimuthal quantum number (also called the angular-momentum quantum number), ℓ, for the orbital shown here? (the photo is a d orbital. it has 4 balls around it) Express your answer numerically as an integer.

**science**

Birds share many different characteristics. List three of these.

**Chemistry**

An astrophysicist working at an observatory is interested in finding clouds of hydrogen in the galaxy. Usually hydrogen is detected by looking for the Balmer series of spectral lines in the visible spectrum. Unfortunately, the instrument that detects hydrogen emission spectra ...

**Chemistry**

6.626 x 10^-34/ m x 1.26 times 10^5 what is plugged in for the mass if it is not given?

**Chemistry**

What is the de Broglie wavelength of an electron traveling at 1.26×105m/s ?

**trig**

16cos(x)-3sec(x)=0 Find all solutions for x in [0, 2pi)

**math**

Kyle reduced his investment in Collins Company from $11,700 to $4,300. What was the percentage rate of decrease?

**Math**

A rectangular backyard measures 15 meters by 20 meters.there is a square flower bed in the middle of the yard with three sides of 3 meters.what is the area of the yard only?

**Algebra**

7(√6/32) I did: 7(√6/32) * (√32/√32) 7(√192/32) ...but then what?

**Math**

A sidewalk borders a rectangular play area.the play area measures 20ft by14ft.the width of the sidewalk is 2 ft.what is the perimeter of the outside borders of the sidewalk?

**Biology help**

How does a gene determine a trait?

**Math**

(6/7c)^2 Is this 6/7c^2?

**Algebra**

I multiplied (√6/√32) by (√32/√32).

**Algebra**

7(√6/32) I came until 7(√192/32). How do I proceed from here?

**algebra**

(12*50) + (16*50) = ?

**algebra**

Gabby walks 12 blocks east from school and then 16 blocks south and each block is 50 yards how far is Gabby from school in yards?

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