# Shreya

Popular questions and responses by Shreya-
## Pre Calculus 12

The height h, in metres, above the ground of a car as a ferris wheel rotates can be modelled by the function h(t) = 18cos(πt/80) +19 what is the minimum height of a car? do i like subtract 19 from 18 ? what is the maximum height of a car? do i add the 19

*asked on January 23, 2013* -
## Pre Calculus 12

permuations an orchestra has 2 violinsts, 2 cellisst, and 4 harpists. Assume that the players of each instrument have to sit together, but they can sit in their own group. In how many ways can the conductor seat the members of the orchestra in a line? I

*asked on January 25, 2013* -
## math-calculus

a plane flew from red deer to winnipeg, flying distance of 1260 km. on the return journey, due to a strong head wind, the plane travelled 1200 km in the same time it took to complete the outward journey. on the outward journey, the plane be able to

*asked on January 8, 2012* -
## Pre-Calculus

Composition of Functions If f(x) = 2x+1 find A. f o f(x) f(f(x)) = f(2x+1) f(2x+1) = 2(2x+1) f(f(x)) = 4x +2 B. f o f o f o f(x) ^ I don't get how to solve this one C. f o f o f o f o f ...o f(x) n functions of f ^ I also don't get how to solve this one

*asked on September 27, 2012* -
## maths

if sinA+cosA=1/5, then a value of tanA/2 satisfies which of the equation? a. 2x^2-x-1 b.x^2-2x-3=0 c.2x^2-5x-3=0 d. 2x^3-7x^2+2x+3=0

*asked on May 30, 2011* -
## math-calculus

two numbers differ by three and their quotient is 3/4. the larger number is? i not get how to do this.

*asked on January 8, 2012* -
## Chemistry

I'm having a hard time understanding Endothermic and Exothermic reactions, like their standard format and stuff. For Exothermic reactions the heat is getting released into the surroundings, the products will be less than the reactants, so I would assume

*asked on September 30, 2012* -
## English grammar

Honour and reputation (is/are) dearer than life. Suitable form of verb is:

*asked on March 28, 2016* -
## finance

I would like to enquire if you could help with the following assignment question. The exact assignment question is: Explain how an investor or analyst should analyse a company's financial statements in order to gain the maximum insight for valuation

*asked on March 31, 2008* -
## Physics

A child leaves her book bag on a slide. The bag, which is at the top of the slide, starts from rest and reaches the bottom in 1.63 s. The mass of the book bag is 2.55 kg, the length of the slide is 2.90 m and the angle of incline is 35.0°. (Assume the

*asked on June 11, 2017* -
## physics

a uniform meter rule is pivoted at 20cm mark . It is balanced when mass of 100gm on 10cm mark and mass of 50 gm on 30 cm mark are suspended. Find d mass of meter rule

*asked on March 26, 2017* -
## Chemistry 12

which of the following 0.10M solutions is basic? A LiCl B K3Po4 C NaCLO4 D NH4NO3 Is it C?

*asked on January 25, 2013* -
## chemistry

Elemental antiomony made by these reactions down below: Sb2S3 + 5 O2 - > Sb2O4 + 3 SO2 Sb2O4 + 4 C - > 2 Sb + 4 CO how many grams O2 needed to prepare 1.00g of Sb? how many grams Sb formed when 84.9g of Sb2S3 and 39.0g of O2 r used in first reaction and

*asked on January 25, 2012* -
## Science, Maths

A block and tackle of 5 pulleys is used to raise a load of 5o kgf steadily through a height of 20m. The work against friction is 2000J.Calculate the work done by effort, efficiency and mechanical advantage.

*asked on September 23, 2017* -
## Pre Calculus 12

Modelling with sine/cosine A Ferris wheel has a diameter of 30m. The bottom of the wheel is 1.5m off the ground it takes 3.5min to make one complete revolution. a person gets on ferris wheel at its lowest point at time = 0. write an equation that

*asked on January 23, 2013* -
## Chemistry

if you double the concentration of HCL acid, will that double rate of reaction? i have to explain in terms of the theory of collision. Wont doubling the concentration double the rate as well?

*asked on September 25, 2012* -
## English Grammar

Please explain adverb phrases, prepositional phrases, verb phrases, noun phrases and adjective phrases along with examples. 2) "How is the weather today, Sam?" said Jonh. Why isn't a comma required before "said John?"

*asked on March 28, 2016* -
## English grammar

"Fame shall sound thy praise from sea to sea". Can this be considered an example of personification?

*asked on March 28, 2016* -
## physics Waves

in which spring do transverse waves travel faster, small diameter spring or slinky? i think this be the transverse waves but i not know how to explain why. in which spring do longitudinal waves travel faster? i think that be the small spring because it

*asked on January 9, 2012* -
## physics

A square plate made of copper has a length of 4.253 m on a side, at 15.00 degrees Celsius. A hole is drilled in the plate, the diameter of which is 1.750 m. The plate is heated to 177.00 degrees Celsius. Assume that alpha= 16.8* 10^-6 for copper. A)

*asked on March 7, 2011* -
## Physics

The length of wire is 25.5cm and it's radius is 1.02mm. Calculate the percentage error in mesurement of its volume

*asked on September 10, 2017* -
## Chemistry 12

The [OH-] of a solution with a PH 5.75 is is it 5.6*10-9M?

*asked on January 25, 2013* -
## math

I bought 12 dozens of eggs at Rs 7.20 per dozen .Eighteen eggs were broken .I sold the remaining eggs at the rate of Rs 7.50 per dozen .find my gain or loss.answer is Rs 7.65

*asked on November 22, 2016* -
## English grammar

Punctuate: My orchard was often robbed by schoolboys and my wife's custards plundered by cats. I think the answer would be: My orchard was often robbed by schoolboys; and my wife's custards, plundered by cats. Am I correct? Why/ Why not?

*asked on March 28, 2016* -
## English grammar

Which of the following is a simple sentence? a) He ran fast but he failed to win the prize. b) Although he ran fast he failed to win the prize. c) In spite of running past, he failed to win the prize. d) He failed to win the prize because he did not run

*asked on March 28, 2016* -
## Pre-Calculus

Laws of Logarithms Without using a calculator use the change of base rule to evaluate 1. a) log(subscript8)32(hint use base 2) =log(subscript2 32)/log(subscript2 8) = 5/3 b) log(subscript36)1296. This one doesnt even give you a hint, so how do you know

*asked on October 16, 2012* -
## math-calculus

solve equation |x^2-2x-6| using quadratic formula. i not get how to do this and it says quadratic formula.

*asked on January 18, 2012* -
## very easy math question

i doing my physics work and so i have to convert 0.0023mm to meters and it seem so easy but i not know how. i first convert it to cm, i times by ten then i divide by 100 to give me meters so i get 0.0023m but it suppose to be 2.3*10^5 m

*asked on January 20, 2012* -
## Biology (High school science)

If non-nucleated cells of meristematic tissue are used for tissue culture, then growth rate will be : a) High b) Average c) Very low d) Growth may not take place. Please help!

*asked on March 30, 2016* -
## Physics

A bullet is moving with velocity u after emerging from a plank its velocity reduces by u/20 then find the total number of planks required to stop this bullet?

*asked on June 22, 2016* -
## biology tutor on jiskha

i post my biology questions here today and few days ago no teacher reply. there not any biology tutor on here?

*asked on February 22, 2012* -
## physics

A river is flowing along the east direction with a velocity of 10km/hr. A person heads towards north with a velocity of 2km/hr. what is the velocity of the person with respect to ground?

*asked on November 30, 2014* -
## Pre-Calculus

The angle θ is in the second quadrant and tan θ = -3/5. Point P is on the terminal arm of angle θ/ Which is a possible coordinate for P? A) (-5,√29) B) (-3,√29) C) (-10,6) D) (-6,10) I drew the triangle, and aren't the coordinates supposed to be

*asked on November 14, 2012* -
## math-calculus

if graoh of y = g(x) passes through point (-3,-6) then graph of y = |g(x)| must pass through point. how it be this answer i want to know (-3,6)

*asked on January 18, 2012* -
## math-calculus

the absolute value function g(x) = |5-x| can be written as a piecewise function. the piecewise function which represents g(x) is this have to be g(x) = x-5 if x be greater to or equal to five. and the negative piece have to be 5-x. does it matter if i

*asked on January 17, 2012* -
## math-calculus

write the following absolute value functions as piecewise functions. i really not get how to do this f(x) = |x| i think im supposed to state as positive and negative but i not even know what that x means. i only guessing and saying that for positive it be

*asked on January 10, 2012* -
## Pre-Calculus

Graphing Polynomials Decide whether each of the following is sometimes true, always true, or never true and explain reasoning. A. A cubic function has 2 different x-intercepts ^Never true, has to have 3? B. A cubic function has 3 x-intercepts ^ Always true

*asked on September 26, 2012* -
## Chemistry

out of these conditions, which would result in fastest reaction? a. 2.0M HCL, powedered CaCO3 chip, 50 degrees celsius b. 6.0M HCL, CaCO3 chip, 25 degrees celsius c. 6.0M HCL, powdered CaCO3, 50 degrees celsius. d. 2.0M HCL, CaCO3 chip, 50 degrees celsius.

*asked on September 25, 2012* -
## Pre-Calculus

Rational Functions does the following function have a hole or a vertical asymptote or both? how do you know? find the y-value at that point. y=x^2+7x+12/x^2+8x+15 I factored this out to y = (x+3)(x+4)/(x+5)(x+3) The x+3's cancelled out. I don't get the

*asked on October 2, 2012* -
## physics

a point charge 50*10 raise to the power -6 C is located in the XY plane at the position vector r0= 2i^+3j^. what is the electric field at the point of position vector r=8i^+5j^?

*asked on June 12, 2011* -
## Maths

Devide the sum of 5/21 and 4/7 by their difference

*asked on July 14, 2017* -
## English grammar

Fill in the blanks with appropriate form of verb (past tense) The jewellery _____(be give)to her by her husband, who _____ died some years before. Since his death, she did not have the heart to wear it, yet she did not want to sell it. Now it seemed that

*asked on March 28, 2016* -
## Math

(3-4sin^2A)(1-3tan^2A) =(3-tan^2A)(4cos^A-3)

*asked on October 14, 2015* -
## chemistry

What must be the velocity of a beam of electron if they are to display a de broglie wavelength of 1A°?

*asked on July 6, 2014* -
## Biology

Hey I am doing a lab, the link is down h t t p : //w w w . sd67 . bc . ca/schools/salc/biology%2012/module%20c%20-%20human%20biology/unit%2010%20-%20respiratory%20system/Homeostasis%20Lab .pdf And I really would like help with #1 My data is right here Pre

*asked on February 7, 2013* -
## Pre-Calculus

Trigonometric Functions, Radian Measure ∏

*asked on November 6, 2012* -
## Biology

Individuals whose characteristics are well-suited to their environment survive. Individuals whose characteristics ar not well-suited to their environment either die or leave fewer offspring. This principle Darwin called survival of the fittest. how i

*asked on March 4, 2012* -
## math-calculus

the formula 1/R = 1/R1 + 1/R2, concerning resistance in an electrical circuit is used in physics. if R = 3 ohms and R1 is 8 ohms more than R2, the value of R1 be? this also not make any sense to me

*asked on January 8, 2012* -
## math-calculus

30/x^2-25 = 3/x-5-2/x+5 i be left with 30 = 3x^2-75-2x^2+50 i not sure what to do? i use the quadratic formula? math-calculus - Steve, Saturday, January 7, 2012 at 3:38pm First, you have to simplify properly: 30/(x^2-25) = 3/(x-5) - 2/(x+5) 30 = 3(x+5) -

*asked on January 7, 2012* -
## finance

I would like to enquire if you could help with the following assignment question. The exact assignment question is: Explain how an investor or analyst should analyse a company's financial statements in order to gain the maximum insight for valuation

*asked on March 31, 2008* -
## Pre Calculus 12

Another sine/cosine question i don't get in vancouver on certain day, high tide is 20m at 2am, the next low tide is 8m at 6am, what an equation that represents height (h)of water at any time (t)since midnight) what is the height of water at 8:45AM? What is

*asked on January 23, 2013* -
## math-calculus

so with this one i do the same thing multiplying what inside absolute value bracket bar with what outside? |2x-8|-2 = 4x so that start me off as -4x+16 = 4x or 4x-16 = 4x. solve equation |x^2-2x-6| = 4 this nothing to do with factoring right? i just add

*asked on January 17, 2012* -
## math-calculus

which of following statements is false 1. The absolute value of a real number is the principal square root of the square of the number. 2. The absolute value of a real number is the distance of the number from zero on a number line. 3. The absolute value

*asked on January 17, 2012* -
## math calculus

(24x^3-54x^2-15x)/(6x^2-15x) i don't factor number from whole equation way i do it is find number that add to give me -54 and multiply to give -360. the number i get -60 and +6. so i do this: 24x^3-60x+6x-15x i factor this further and get

*asked on January 4, 2012* -
## Chemistry 12

name a compound that acts as a weak base? methanol? define the term weak bronsted-lowry base im not sure how to put this in words, but a weak base is found when you got a strong acid, when your ka is high, kb will be low.

*asked on January 25, 2013* -
## Pre Calculus 12

Identify the point on the unite circle coressponding to an angle of 300 degrees in standard position A (-√3, -√3/2) B (-√3/2, 1/2) C (1/2, -√3/2) D (1/2, -√3 ) I don't get how to figure this out :|

*asked on January 24, 2013* -
## math-calculus

solve for x. |3x-2| = |2x+5|+1 okay so for these one it be |3x-2| = |2x+5| because 1 times in with |2x+5| or it be (-2x-5)

*asked on January 18, 2012* -
## math calculus

7/(x-2)(x+5)-8/(x+5)(x-3) 7(x-3)-8(x-2)/(x-2)(x+5)(x-3) 7x-21-8x+16/(x-2)(x+5)(x-3) 7x-8x give me -1x and -21+16 give me -5. for numerator but it have to be -1/(x-2)(x-3) i not know how to do this please explain process my way not different way.

*asked on January 4, 2012* -
## Physics

find the magnitude resultant of two forces (3j+4j) and (3j+4k)

*asked on June 19, 2018* -
## Maths

A circular park of 28 m diameter has been constructed. A 3.5m circular track outside has been developed along the park. Using algebric formulae, find the area of the track around the park.

*asked on December 16, 2016* -
## English grammar

1) Observe the relation and fill in the blanks. food:crude:: should: ____ (I think the answer could be prude but it could also be would, could etc. I considered these answers because all of them rhyme with should just like crude rhymes with food. But there

*asked on March 28, 2016* -
## English grammar

1) If it rained heavily, the reservoirs______ full. Use the right form of verb to fill in the blanks. a) will be b)would be c)would have been d) will have been (I think the answer is option b). Am I correct?)

*asked on March 28, 2016* -
## Biology - URGENT Enzyme Lab

Did a catalase producing hydrogen peroxide lab, used manganese dioxide, fresh frozen liver, potato, ice, fine clean sand, etc. Basically just added hydrogen peroxide to the catalysts under diff conditions and stuff. Just don't get this question which is :

*asked on April 5, 2013* -
## Pre-Calculus

Composition of Functions f o g(x)=f(g(x)) --> I know that this is eqivalent to f(g(x)) Given f(x) = 2x+1, and g(X) = 3x+1 find:f o g(x)=f(g(x)) This is what I did, but I don't think Ive solved it correctly f(g(x)) = f(x-3) f(x-3) = 1(x-3)-3x+2 =x-3-3x+2

*asked on September 27, 2012* -
## Pre-Calculus Graphs expansions/compressions

Need help with this question, don't get it. Given the relation x^2+3x=y^2-2y, what is the new relation if it has undergone: A. vertical expansion by 2 B. Horizontal expansion by 3 C. Vertical compression by 4/5 D. Horizontal compression by 1/5 E.

*asked on September 12, 2012* -
## math-calculus

write the following absolute value functions as piecewise functions. i really not get how to do this f(x) = |x| i think im supposed to state as positive and negative but i not even know what that x means. i only guessing and saying that for positive it be

*asked on January 10, 2012* -
## Science

How many electrons are present in 0.01 moles of sulphate ion

*asked on November 16, 2016* -
## Ms sue please help

Hey ms sue can you please help me to simplify this paragraph? Raynaud's disease occurs when the small arteries (arterioles) that serve the fingers, toes, ears, or nose go into spasm. When arterioles go into spasm, they cut off blood supply and cause digits

*asked on May 13, 2013* -
## Chemistry 12

The value of Kb for HPO₄²- is? A. 2.2*10^-13 B. 6.2*10^-8 C. 1.6*10^-7 D. 4.5*10^-2 I don't get how to solve this.

*asked on January 25, 2013* -
## Pre-Calculus

solve by fully factoring x^3-7x-6=0 How would I fully factor this?

*asked on October 2, 2012* -
## Pre-Calculus

Operations with Functions write the function below as either a sum/difference/product/quotient of 2 r more functions a. h(x) = x^2+3x+9 How Would I do this? My teacher just did this f(x) = x^2 g(x) 3x+9 ^I don't really understand h(x)=(x+5)(x-3) how would

*asked on September 26, 2012* -
## biology

why DNA replication necessary to life?

*asked on February 21, 2012* -
## easy math

i want know how to say this in words. I try myself in brackets. i am doing this for bio class so if i have to speak out loud tomorrow i be able to correctly say numbers. 1 585 000 000 ( 1 billion, 585 million hundred thousands) 1 585 000 ( 1 million, five

*asked on January 31, 2012* -
## math-calculus

(5y)/(6y^2-7y-3)+(4y-3)/(2y^2-15y+18)consider nonpermissible values for the addition of this equation, the product of the nonpermissible values is. 5y/(2y-3)(3y+1)+(4y-3)(2y-3)(y-6) i not get what it asking for.

*asked on January 9, 2012* -
## math-calculus

x^2+9xy+20y^2 i never deal with something like this before i come up with (x+4)(x+5) but that wrong because y have to be there how i do this?

*asked on January 8, 2012* -
## socials

Question:Hey I posting for my brother Mohammad again, his computer not work I not know why. You please unblock any people so he access again. His question. What goals of the FLQ. Me him not know if list goal one by one. We only have to achieve Quebec

*asked on December 14, 2011* -
## Biology Difference b/w Heat Exhaustion/Heat Stroke

I want to know the causes of heat stroke and heat exhaustion. I cant seem to find separate causes for the two, finding very different answers online :|

*asked on February 8, 2013* -
## Pre Calculus 12

Laws of logarithms evualuat using change of base rule log(√8)16 ^the square root 8 is supposed to be subscript. the answer i got was 8/3, not sure if that is right

*asked on January 23, 2013* -
## Pre Calculus 12 urgent

andrew is working on a binomial problem (1/2x-y)^7. He asks u to : i) what the coefficient of the 6th term ii) find the term that has the variabes x^47^3 (ex. 34x^4y^3) iii) find the first three terms of the expansion I really need help with that ^ . I

*asked on January 18, 2013* -
## Pre Calculus 12

Im on the chapter of permutations/combinations/fundamental counting principle need help with 2 questions 1. emma is arranging her books in piles on her desk. she has 5 math books, 3 english books, and 4 science books. how many ways can she arrange them if

*asked on January 18, 2013* -
## Pre-Calculus

Exponential Functions A=P(X)^t/n A-final amount P-initial amount X-growth rate t-time n-number of growth periods The teacher had this question as an example and did it however i do not understand one thing: The Ebola virus double every 30 min. If there are

*asked on October 16, 2012* -
## Biology- DNA

why dna replication necessary to life? i think it because it carry genetic information?

*asked on February 20, 2012* -
## math-calculus

i did this question long time ago and i realize today that at back of book answer be different. write the following absolute value functions as piecewise functions. g(x) = |x+1| positive be x+1 negative be -(x+1) but in back of book it says negative one be

*asked on January 16, 2012* -
## physics waves transverse longitudinal

i real stuck on this and i really want explanations please. in which sprind do transverse waves travel faster, small diameter spring or slinky? i think this be the transverse waves but i not know how to explain why. in which spring do longitudinal waves

*asked on January 9, 2012* -
## math-calculus

i think i do something wrong again(2x+1)/(x-3)-(4x-1)/(2x-3) = 0 (2x-3)(2x+1)-(4x-1) = (0)(x-3)(2x-3) 4x^2+2x-6x-3-4x-1 = 2x^2-3x-6x+9 4x^2-4 = 2x^2-3x-6x+9 -2x^2-9x+13 i put this in quadratic formula and i think it wrong becaue i get 9/2 and 0for x and it

*asked on January 7, 2012* -
## math-calculus

30/x^2-25 = 3/x-5-2/x+5 i be left with 30 = 3x^2-75-2x^2+50 i not sure what to do? i use the quadratic formula?

*asked on January 7, 2012* -
## socials

Canada not with Vietnam war that happen after 1950's and that when Canada start getting independent on own. Defense line happen early years and that when Canada was with U.S. But what were the foreign policies?

*asked on December 13, 2011* -
## math

would you use mental math to solve 2984+1997+406? explain

*asked on December 10, 2011* -
## Science

Why the ball of ventrical is thicker than the ball of atrium

*asked on May 12, 2017* -
## math

Two 5-digit numbers have the same sum of digits: 2. The largest possible difference between two such numbers has the sum of digits: A 1 B 9 C 18 D 27 E 36

*asked on June 28, 2016* -
## biology anyone..

please i need this by tomorrow. if nucleii are 3 micrometres long, how big are the cells? these r 2 questions i not get.

*asked on February 16, 2012* -
## easy math

I converting 0.001mm to micrometers using staircase method and micro come under millimeter, so that mean move one decimal to right so would it not be 0.01?

*asked on January 31, 2012* -
## math-calculus

solve for x. |3x-2| = |2x+5|+1 okay so for these one it be |3x-2| = |2x+5| because 1 times in with |2x+5| or it be (-2x-5)

*asked on January 18, 2012* -
## math-calculus

value of |7|-|-6|+|-cubicroot-64| i got 25 after doing whole thing but real answer be 5, i not get how to get that.

*asked on January 18, 2012* -
## math-calculus

|2x-3|-|2x+5| = 0 i please need helps with this.

*asked on January 18, 2012* -
## math-calculus

x^2+9xy+20y^2/x^2+5xy (x+4y)(x+5y)/(x))x+5y) i cancel off x+5y's (x+4y)/(x) that be the anser?

*asked on January 8, 2012* -
## Physics waves

in which sprind do transverse waves travel faster, small diameter spring or slinky? i think this be the transverse waves but i not know how to explain why. in which spring do longitudinal waves travel faster? i think that be the small spring because it

*asked on January 8, 2012* -
## Pre Calculus 12

Im going over my pre calculus 12 exam, and I need help with one question from the chapter Transformations of graphs and stuff. Combining Transformations 2y = f(5x-10)+8 The original points are (4,6) and the new points I got by translating it and stuff are

*asked on January 22, 2013* -
## Maths

Why the ball of ventrical is thicker than the ball of atrium

*asked on May 12, 2017* -
## Maths

theo invests £800 in an account that pays 2% simple interest each year how much interest is earned in a year how much there will be in the account after 5 years how much will there be in 10 years

*asked on May 17, 2015*

## Pages

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