# Posts by Krista

Total # Posts: 80

**PRECALC**

Who the hell is on here at 1:30 in the morning?

*March 26, 2016*

**Science**

i got 2/5!!!! F*ck you

*January 29, 2016*

**Science**

Not correct kpop!

*January 29, 2016*

**Science**

what about the 5 th question

*January 29, 2016*

**Physics**

Can you help me understand the graphic relationship between d vs t, v vs t, and a vs t?

*September 6, 2015*

**Math**

A store sells boxes of chocolates wrapped with a bow . If the bow is made from a 15 inch length of ribbon: A) how much ribbon remains from a roll which is 10 yards long after 20 boxes have been wrapped? B) How many more boxes can be wrapped in this way? Thanks

*April 13, 2015*

**Math**

The following diagram represents a coffee table . If the scale is 1:30, determine the actual dimensions of the table it is 41/2 length and 2

*April 12, 2015*

**Math**

To support a damaged tree, a guy wire is attached to it and secured to a peg in the ground some distance away ( see the diagram below). 2 ft is by the guy wire 8 ft and 50 degrees

*April 12, 2015*

**Math**

A room measures 15 ft by 12 ft . Sketch and label a diagram and then calculate its area and perimeter

*April 12, 2015*

**Biology**

I need some help with these questions. I've chosen answers, but I want to make sure if they are correct. 1)Which of the following is an acidic pH? 6 7 8 800 A: 6 None of the above ------------------------------------- 2) Which of the following is directly produced by ...

*March 20, 2015*

**math**

The equation of line AB is y = 2x + 4. Write an equation of a line parallel to line AB in slope-intercept form that contains point?

*February 27, 2014*

**math**

The equation of line AB is (y-3) = 5 (x - 4). What is the slope of a line perpendicular to line AB?

*February 27, 2014*

**math**

The equation of line AB is y = 2x + 4. Write an equation of a line parallel to line AB in slope-intercept form that contains point (3, -2).

*February 27, 2014*

**Geometry**

Three coplanar lines always make a triangle? Find a counter example.

*September 24, 2013*

**Geometry**

2,3,5,7,11... What is the inductive reasoning?

*September 24, 2013*

**Geometry**

3,4.5,6.75,10.125... what is the inductive reasoning?

*September 24, 2013*

**Geometry**

2,3,5,7,11.... What is this inductive reasoning?

*September 24, 2013*

**Geometry**

2,3,5,7,11.... What is this inductive reasoning?

*September 24, 2013*

**Geometry**

3,4.5,6.75,10.125... what is the inductive reasoning?

*September 24, 2013*

**jm**

Running, playing, etc.

*September 24, 2013*

**Chemistry II**

Thank you so much!

*August 26, 2013*

**Chemistry II**

An analgesic mixture is 37.5% aspirin by mass. How many grams of the mixture are needed to provide 325 mg aspirin. Make sure to show your work.

*August 26, 2013*

**Math PLEASE help**

Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...

*May 30, 2013*

**Math**

Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...

*May 30, 2013*

**Calculus**

Determine whether the planes are parallel or orthogonal. Equations given: 5x - 3y + z = 4 x + 4y + 7z = 1 How exactly do I solve this? It wasn't covered completely in class.

*April 8, 2013*

**Vectors/Calculus**

Thank you!

*April 7, 2013*

**Vectors/Calculus**

The question asks me to find the area of the triangle with the given vertices. (The area A of the triangle having u and v as adjacent sides is given by A=1/2 ||u x v||.) the vertices are: (0,0,0) (1,2,3) (-3,0,0)

*April 7, 2013*

**Math**

What is the better deal? Earning $1000 a day for the rest of your life or earning $.01 the first day and doubling it every day for the rest of yor life. How do you know?

*November 29, 2012*

**3rd Grade Math**

Start with the idea that some of the students can be paired (boy/girl, boy/girl, boy/girl... Then ask what (or who) will be left over after the pairing.... 9 boys. So have the child set the 9 boys apart... so instead of pairing 25 students we'll pair....be sure to ask the ...

*October 2, 2012*

**chemistry**

an aluminum cylinder is 10.0 cm in length and has a radius of .25 cm. if the mass of a single atom of aluminum is 4.48X10^-23 calculate the number of aluminum atoms present in the cylinder. the density of aluminum is 2.70 g/cm^3 Please answer quickly.

*September 7, 2012*

**Physics**

For no apparent reason, a poodle is running counter-clockwise at a constant speed of 3.00 m/s in a circle with radius 2.9. Let v_1 be the velocity vector at time t_1, and let v_2 be the velocity vector at time t_2. Consider \Delta v = v_2-v_1 and \Delta t = t_2 - t_1. Recall ...

*March 16, 2012*

**physics**

A long string is wrapped around a 6.2cm diameter cylinder, initially at rest, that is free to rotate on an axle. The string is then pulled with a constant acceleration of 1.9 m/s^2 until 1.0 m of string has been unwound. If the string unwinds without slipping, what is the ...

*March 15, 2012*

**Physics**

If you step on your car's brakes hard, the wheels stop turning (i.e., the wheels "lock") after 1.5 revolutions. At the same constant acceleration, how many revolutions do the wheels make before stopping if your initial speed is twice as high?

*March 15, 2012*

**Math**

Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Pleaseeee help!!

*February 24, 2012*

**Statistics**

A telephone company's goal is to have no more than 4 monthly line failures on any 100 miles of line. The company currently experiences an average of 5 monthly line failures per 50 miles of line. Let x denote the number of monthly line failures per 100 miles of line. ...

*February 11, 2012*

**Statistics**

Seven thousand raffle tickets are to be sold at $10 each to benefit a local community group. The prizes, the number of each prize to be given away, and the dollar value of winnings for each prize are as follows: Prize Number to Be Given Away Dollar Value Automobile 2 $21,730 ...

*February 11, 2012*

**Statistics**

Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to find the probability that four or more car ...

*February 11, 2012*

**Math**

Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to find the probability that four or more car ...

*February 11, 2012*

**Math**

Seven thousand raffle tickets are to be sold at $10 each to benefit a local community group. The prizes, the number of each prize to be given away, and the dollar value of winnings for each prize are as follows: Prize Number to Be Given Away Dollar Value Automobile 2 $21,730 ...

*February 11, 2012*

**Physics**

In the vertical jump, Kobe Bryant starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 second in the air (their "hang time"). Treat Kobe as a particle and let ymax be his maximum height above the floor...

*February 2, 2012*

**physics**

In a historical movie, two knights on horseback start from rest 60 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.20 m/s2, while Sir Alfred's has a magnitude of 0.28 m/s2. Relative to Sir George's starting ...

*January 12, 2012*

**physics**

Brookney kicks a soccerball with a speed of 17m/s at 43 degress above the horizon. How far does the ball go before it hits the ground?

*October 25, 2011*

**trig**

I believe that the final step would be 35 divided by tan20. As Steve explained, the angle between the ground and the shadow is 20 (complementary to the 70) and TAN is opposite/adjacent or the 35m height of tree divided by the unknown length of shadow. Algebraically, you ...

*October 17, 2011*

**chemistry**

Calculate the molarity of NaI in a soultion obtained by adding 5.0 mL of 0.2 M NaI to a mixture of 5.0 mL of 0.2 M K2SO4,5.0 mL K2S2O8, 4.0 mL of H2O and 1.0 mL of Starch

*October 13, 2011*

**chemistry**

Nitrosyl chloride, NOCL, decomposes to NO and C1 in accordance with the following equation: 2NOC1(g)--> 2NO(g)+ C1 2(g) Determine the rate equation and the rate constant for the reaction for the following data: [NOC] 0.10 0.20 Rate, M/s 0.8 x 10(-3) 3.20 x 10(-3) 0.30 7.20 ...

*October 13, 2011*

**chemistry**

A solution of 11.7 g of fructose in 325 g of ethanol has a boiling point of 78.59 C. The boiling point of ethanol is 78.34 C and kb for ethanol is 1.2 C/m. What is the molecular weight of fructose?

*October 13, 2011*

**chemistry**

Very carefully explain which will evaporate faster under conditions: 50.0 mL of distilled waater or 50.0 mL of sea water.

*October 13, 2011*

**math**

Thanks so much.

*September 8, 2011*

**math**

Thank you. So would my range be 1200 - 1400?

*September 8, 2011*

**math**

How do you find a range to estimate each sum 388+192+741 Thank you.

*September 8, 2011*

**physics**

Momentum of a bullet of mass 1.34 x 10-3 slug traveling 735 ft/ s

*August 25, 2011*

**math**

how do you find the rule to a f(x) problem?

*May 9, 2011*

**math**

how do I calculate 22 x n is between 80 and 85 please

*April 12, 2011*

**Physics**

The arm of a crane at a construction site is 13.1 m long, and it makes an angle of 20° with the horizontal. Assume that the maximum load the crane can handle is limited by the amount of torque the load produces at the base of the arm. (a) What is the magnitude of the ...

*March 21, 2011*

**math**

23 students went to the school store, 17 bought pencils,12 bought paper, how many purchased both?

*February 14, 2011*

**PHYSICS**

okay thanks i get it (:

*October 17, 2010*

**math 191**

im sorry, i wrote the question wrong, its supposed to be: f(x)=(-3/x^2), but i think i can follow this same format to solve this one too right?

*May 22, 2010*

**math 191**

Compute the difference quotient: [(f(x)- f(a))/(x-a)].. for f(x)= (-1/x^2)

*May 22, 2010*

**Precalulus-NEED HELP!**

PLEASE HELP! Compute the difference quotient: [(f(x)- f(a))/(x-a)].. for f(x)= (-1/x^2)

*May 22, 2010*

**Math**

solve by the substitution method 7x+4y=14, x=47-7y please help

*May 16, 2010*

**precal**

Evaluate tan B tan C if triangle ABC is not a right trianlge and cos A=cosB cosC.

*May 10, 2010*

**Precal nightmare**

Show that: sec (A-B)= (cos(A+B))/(cos^2 A-Sin^2 B)

*May 6, 2010*

**Precal**

show that: (1-tanx)/(1+tanx)= (1-sinx)/(cos2x)

*May 6, 2010*

**physics**

calculate the centripetal acceleration of the earth in its orbit around the sun and the net force exerted on the earth. What exerts this force on the earth? Assume that the earth's orbit is a circle of radius 1.50x10^11m. (earth's mass= 5.98x10^29kg, Sun's mass= 1....

*April 27, 2010*

**English**

hi. I am bit confused with the poem...does Barbara know that Nathan is blind before she pulls the faces..or does she figure out that nathan is blnd at the end,by saying the line"THen, she stiffens and frowns"??

*April 26, 2010*

**English**

How do you find a verbal phrase in a sentence then identify it as a gerund, particpial, or infinitive phrase?

*April 21, 2010*

**math**

evaluate: cos (arc sin (4/5) - arc tan 2) with out using a calc.

*April 15, 2010*

**math-191**

ohh i see duh!! lol thanks =)

*April 13, 2010*

**math-191**

yea i realize that but the question says "show" that they equal each other. im thinking possibly by some sort of identity or something.

*April 13, 2010*

**math-191**

^ sorry didn't finish: show that k(x)= k(1/x)

*April 13, 2010*

**math-191**

show that k(x)= (5x^3) + (5/x^3) - x- (1/x)

*April 13, 2010*

**math 191- calc**

sect + tan t= (sqr 3)

*April 12, 2010*

**math 191 calc**

((sqr 3)sin t)-((sqr 1)+(sin^2)*t)=0

*April 12, 2010*

**10th grade**

Brainstorm the phrase 'Wherever you go, there you are'

*February 10, 2010*

**Physics**

A rocket with a mass of 345 kg is launched vertically. the engine produces a thrust of 17000 N. Neglect air resistance. a. How would I determine the weight of the rocket? b. What is the net force being applied to the rocket?

*November 23, 2009*

**Pre-calculus**

How do you write an equation of a translated line given the equation of the original line and both the translated and original lines on a graph?? Thanks in advance!!

*September 2, 2009*

**Pre-calculus**

How do you write an equation of a translated line given the equation of the original line and both the translated and original lines on a graph?? Thanks in advance!!

*September 2, 2009*

**math**

Pg 220 # 59 Is this answer given correct for the following question?If it is not correct what is the appropriate answer Question: A quantity and its two-thirds and its half and its one-seventh together make 33. Find the quantity Answer: 14+ ¼ + 1/56 + 1/97 + 1/194 + 1/...

*April 24, 2008*

**philosophy**

just a question... do you guys edit essays here? (for grammar/sentence structure?)

*October 12, 2007*

**science**

i have a joke my science teacher asked my lab partner what is the density of water for are project it was 1.0 he said boiling it she said no then he said buring it she said no then he said throwing it of a rocet And I don't get it.

*September 5, 2006*

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