# Posts by chelsea

Total # Posts: 841

**Math (Calculus)**

Find the length of the curve. You may use your calculator. f(x)=x^(1/3)+x^(2/3) [0,2] I understand that the function needs to be written as x in terms of y because there's a vertical tangent at x=0, but I don't understand how to go about the problem other than that.

**Physics**

Okay, thank you! That makes much more sense :)

**Physics**

You sit at the edge of a merry-go-round of radius 1.5 m. Your friends spin the ride faster and faster. When the period of rotation is 2.5 seconds, you slide off on a tangent. Determine the static coefficient of friction between you and the ride.

**math**

Two standard six-sided dice are rolled and the sum of their squares computed. Find the probability that the resulting number will be an element of the set {2,5,8,10,13,17,18,20,26,29,32,34,37,41,45,52,61,72} {2,5,8,10,13,17,18,20,26,29,32,34,37,41,45,52,61,72} .

**Physics**

Okay, thank you. That makes much more sense :)

**Physics**

Anthony Rizzo hits a baseball in such a way that it leaves his bat traveling at 40.4 m/s at an angle of 26 degrees above the horizontal. When hit, the baseball is 1.2 m above the ground, is in fair territory, and is 127 meters away from a 3.5 m tall fence? Is this a home run?

**Algebra**

A group of students plotted the number of hours they worked at a cake shop during the holidays and the number of cakes they delivered in a week. Graph shows 0 to 60 on x axis and y axes at increments of 10. The label on the x axis is Weekly Hours Worked, and the label on the y...

**Chemistry**

You carry out tlc on silica gel of a mixture of compound A and B. Using a mobile phase of hexane 50% and acetone 50% the Rf values of were A 0.15, B 0.2, and the spots were overlapping. What change would you make to the solvent composition to improve the separation? Explain.

**Math **

if a note has a frequency of 220 hz find the frequencies of the notes one two and three octaves

**math grade 8/ unit test lesson 13/unit 2**

#12 the cones below are similar,although not drawn to scale.what is the radius of the larger cone. a)10 b)11 c)12 d)13 i think it is c

**Math**

The baseball team won 6 games more than they lost if the team won 18 games about what percent of the games did they lose

**algebra**

Given the parent function of f(x) = x3, what is the value of h in the translated graph of f(x ? h) + k?

**Math aglebra**

I need help RIGHT NOW!!!!!!!!!!!!!! On the blueprints of Adam's office building, the length of his rectangular office space is 5 1/4 inches. If the actual length of Adam's office space is 10 1/2 feet, what is the scale of the blueprint?

**Chemistry**

102.0 MHz (typical frequency for FM radio broadcasting) Express your answer using four significant figures.

**Math**

Thank you!

**Math**

But my homework is giving me a choice of 5 answers 2/7 3/8 1/7 1/3 2/5 Which one is it?

**Math**

Thank you

**Math**

John has 21 coloured pencils in a bag. 6 of the pencils are red. John pulls out one pencil at random. What is the probability that it will be red?

**Math**

There is a question on this paper but I agree with you it does not have the right information thanks anaways

**Math**

Find the volume of a cake of edge 4cm.

**Maths**

Express four hundred and one thousand eight hundred and nine in figures.

**Math**

Add 3 hours 43 minutes and 5 hours 56 minutes.

**Math**

Thanks

**Math**

What is the value of 0.7 of 70?

**Math**

Thank you very much ur the best

**Math**

London for example ilford county

**Math**

I don't mean to bother you but has anyone done the 11+ exam or is going to do it?

**Math**

Sorry im new here so I don't know if he answered it or if it was something else but thanks Damon

**Math**

That the answer?

**Math**

If one pack of lawn feed treats 12 square metres,how many packs are needed for a lawn 15m long and 4m wide?

**Math**

Thanks

**Math**

Sam has saved twice as much as Mick,but only one-fifth as much as Benji.If Mick has saved £23,how much has Benji saved?

**Math**

Thank you very much 😀

**Math**

If £480 is shared in the ratio 1:2:3,what is the value of each share?

**Math**

Thanks so much

**Math**

How many 10cm x 10cm tiles are needed to tile an area 2m long and 1.2m wide?

**Algebra**

Idk need help

**Algebra**

number of hours they worked at a cake shop during the holidays and the number of cakes they delivered in a week. Graph shows 0 to 60 on x axis and y axes at increments of 10. The label on the x axis is Weekly Hours Worked, and the label on the y axis is Number of Cakes ...

**Physics**

A photon has a frequency of 7.3 × 10–17 Hz. Planck’s constant is 6.63 × 10–34 J•s. The energy of the photon, to the nearest tenths place, is × 10–50 J.

**clothing and textiles**

textiles clothing and fashion focuses on the development of skills in the use and care of fabric

**Chemistry**

If you had observed the fate of an ice cube at 25 degrees Celsius, what would you conclude about the spontaneity of the process H2O (s) <-> H2O (l) ? I know for it to be spontaneous, delta G has to be negative, but how can I determine the delta G with the info given in ...

**stats**

A particular normal distribution has mean of 575 and standard deviation of 150. What X values form the boundaries for the middle 60% of the data? Round answers to two decimal places. Lower boundary: Blank 1 Upper Boundary: Blank 2

**Chemistry**

Molarity is love

**Math**

24-4=? Use that number and divide it by how many problems there were to begin with.

**Heart of Darkness**

1. Different settings. Consider how Kurtz and the pilgrims act differently in the following settings. • Belgium For this one I said they act very civilized because they want to keep up appearances, but I don't remember any specific examples • The Congo Kurtz is ...

**Maths**

100 (60/80)=75%

**Chemistry**

Which substances are not ionized in a aqueous solution? Hi, KBr, H2SO4, HNO2, AgCl, Ca(NO3)2

**Chemistry**

A compound isolated from oil of mint has a characteristic cool, refreshing odour. It is frequently used in cough drops to ease the pain of a sore throat. This compound contains only C, H, and O. If 95.6 mg of this compound burns completely in O2, and yields 269 mg of CO2 and ...

**Chemistry**

A compound isolated from oil of mint has a characteristic cool, refreshing odour. It is frequently used in cough drops to ease the pain of a sore throat. This compound contains only C, H, and O. If 95.6 mg of this compound burns completely in O2, and yields 269 mg of CO2 and ...

**Chemistry**

1. The formation of water-insoluble chloride salts, especially silver(I) chloride, is useful for the analysis of compounds that contain chlorine. Consider the following unbalanced equation: _____ BaCl2(aq) + _____ AgNO3(aq) --> _____ AgCl(s) + _____ Ba(NO3)2(aq) a. Balance ...

**Chemistry**

1. Ammonia gas can be prepared by the following unbalanced equation: _____ CaO(s) + _____ NH4Cl (s) --> _____ NH3(g) + _____ H2O(g) + _____ CaCl2(s) a. Balance the equation. CaO + 2NH4Cl = 2NH3 + H2O + CaCl2 b. Suppose you begin this reaction with 112. grams of CaO and 224...

**Chemistry**

You purchased a 5.00 pound bag of sugar (sucrose, C12H22O11) at the grocery last week to bake cookies. Conversion: 1 pound = 1 lb = 454 grams. a.How many grams of sucrose did you purchase? 454 grams (g) = 1 pound (lb) 454 g * 5 = 2270 g A 5 pound bag of sugar is equal to 2270 ...

**Chemistry**

An unknown organic compound is 40.00% C, 6.67% H and 53.33% O by mass. The formula weight of the unknown is 90.0g/mole. Find the empirical and molecular formulas for the unknown compound.

**Chemistry**

How many moles of ammonium ions and how many moles of sulfate ions are contaiuned in a 0.400 mile sample of (NH4)2SO4? Referring to the 0.400 mole sample of (NH4)2SO4 on the previous page, how many atoms of N,H,O, and S, are contained in this sample?

**physics**

A speeder driving down the road at a constant 20m/s passes a patrolman parked on the roadside. The patrolman waits 3 seconds then pursue the speeder accelerating at a constant 4m/s2. When does the patrolman catch the speeder

**Chemistry**

Part 1: Find the % by mass of each element in camphor (C10H20O). Step 1: Find the atomic mass of each element in the molecule. Atomic Mass of C: 12.0107 Atomic Mass of H: 1.00794 Atomic Mass of O: 15.9994 Step 2: Find the mass combination of each element. Carbon: 10 atoms 10...

**Geometry**

X= 50

**Ivy tech**

25

**chemistry**

For the following chemical reaction, how many moles of silver iodide (AgI) will be produced from 4 mol of calcium iodide (CaI2)?

**Simple interest**

l=40

**Statistics**

Dear Ms.Sue, We are working as a group, each one of us has a post based on the questions we need help with, when going back it is much easier to locate our specific questions when we see our individual names. Thank you

**Statistics**

The results of a nationwide survey show that 57.40% of college students have violated rules of alcohol use. The margin of error for the survey is 2.30%. What does this mean?

**math**

ramon spent 60% of his $437 paycheck gifts for his friends .how much did he spend

**math**

17 is what percent of 51

**math**

22 is what percent of 88

**math**

what is 42% of 87

**math**

peter spent 20% of his money. he has $40 left in his pocket . how much did he go out with.

**math**

Todd had $44 in his wallet. he spent 30% of his money. how much money does he have left

**math**

sal spent $6 out of $12. what percent of his money did he use

**CHEMISTRYYY**

What mass of PCl3 forms in the reaction of 70.6 g P4 with 268 g Cl2 ? P4 + 6Cl2 → 4PCl3

**Chemistry**

Copper is changed to copper(II) ions by nitric acid according to the following equation: 4HNO3 + Cu → Cu(NO3)2 + 2NO2 + 2H2O How many moles of HNO3 must react to produce 0.961 mol of NO2?

**Math**

Three eights of the cast in a musical have to sing. What fraction of the cost does not have to sing?

**math**

Ok. The question is 'How does the ratio of two side lengths within one figure compare to the ratio of the corresponding side lengths in the other figure?' if you just give me a hint on this please!

**coordinate algebra**

The area of a rectangle is found by multiplying the length by the width: A = lw. A certain rectangle has an area of x2 + 7x + 12. Factor the trinomial to find the length and width of the rectangle. In the form of a paragraph, describe the process necessary to factor the area ...

**college statistics**

the math SAT scores for all students who applied to the school of engineering are normally distributed with M=629 and standard deviation of 60. the school of engineering has decided to accept those students whose scores fall in the top 15%. what is th minimum score an appliant...

**college statistics**

the average length of time required for students to complete a test in a an introductory statistics course is found to be 50 minutes with a standard deviation of 12 minutes. if students are allowed 80 minutes to complete the test , approximately what percentage of the students...

**Physics**

A projectile is launched upward at 26m/s at 30 degrees from the horizontal. The whole path of the projectile takes place over level ground. How much time will the projectile be in the air?

**math**

26

**Physics**

A cat jumps on to a railing at a height of 1.20 m above the ground. He jumps at an angle of 70 degrees relative to the floor. How fast does he have to be moving when he leaves the floor in order for him to make it up to the railing?

**Physics**

A basketball player shot a ball. It left his hand at a height of 2.05 m above the court at an angle of 40 degrees relative to horizontal, what initial speed did the ball have if it hit "nothing but net" at the basket 4.50 m away? Assume the rim is 3.05 m above the ...

**Physics**

A ball leaves a kicker's foot with a velocity of 23.0 m/s and at an angle of 40 degrees up from the ground, how far did the ball travel before being caught by another player?

**Physics**

The swim portion of a triathlon takes place in a river and is an out-and-back course. The river has a steady current that is 0.400 m/s and the athletes swim against the current for 750m before returning and swimming with the current for the second 750m. If one competitor can ...

**geometry**

If ac=5x-16 and gf = 2x-4 then af =

**Calculus - Simpson's Rule and Arc Length**

Can any show me step by step on how to get this? I keep on getting different answers... Thank You! Use Simpson's rule with n=10 to estimate the arc length of y=x^(-1/3), for 1 <= x < 6.

**mathematics**

4 quarters of x is 36. X is equal to A)9 B)50 C)144 D)40

**project**

Virginia ratified the constitution with the help of all of the following men EXCEPT: A.Washington B.jefferson C.henry D.Madison

**Calc 2**

i know that for 3/k(k+1)(k+2) I would use partial fraction representation

**Calc 2**

find the sum of the series: sum from k=1 to infinity [(3/k(k+1)(k+2))+(-2/3)^k]

**Calculus II**

Compute the first 5 terms of the sequence: {b(n)}n=1-> infinity = nsqrt(6n) + (5/6)^n. ((that is:(Bsub(n))from n=1 to infinity = nth root of 6n + (5/6)raised to n.)) If the sequence converges, find the limit.

**Calculus II**

Consider the sequence: (a,sub(n))={1/n E(k=1 to n) 1/1+(k/n)} Show that the limit(as n-> infinity) A(sub(n))= ln 2 by interpreting a(sub(n)) as a Reimann Sum of a Definite Integral.

**Calc 2**

Consider the sequence: (a,sub(n))={1/n E(k=1 to n) 1/1+(k/n)} Show that the limit(as n-> infinity) A(sub(n))= ln 2 by interpreting a(sub(n)) as a Reimann Sum of a Definite Integral.

**Calculus II**

Compute the first 5 terms of the sequence: {b(n)}n=1¨‡ = nã6n + (5/6)^n. ((that is:(Bsub(n))from n=1 to infinity = nth root of 6n + (5/6)raised to n.)) If the sequence converges, find the limit.

**algebra**

150 days

**calc 2**

my professor is killing me....

**calc 2**

(last one) ... Let f(t) be a function defined for all values of t. The Laplace Transform of f(t) is defined by: F(s)= ç[∘,‡](e^-st(f(t))dt). If the improper integral exists, Find the Laplace Transform for f(t)= sinhat

**Calc2**

Let f(t) be a function defined for all values of t. The Laplace Transform of f(t) is defined by: F(s)= ç[∘,‡](e^-st(f(t))dt). If the improper integral exists, Find the Laplace Transform for F(t)=t^2.

**Calculus II**

the gamma function r(x) is defined by r(x)= integral from 0 to infinity of x^n-1(e^-1)dx where n>0. Use integration by parts to show that r(n+1)=nr(n).

**Calculus II**

the gamma function r(x) is defined by r(x)= integral from 0 to infinity of x^n-1(e^-1)dx. find r(1), r(2), r(3)

**Calculus II**

using integration by partial fraction, prove that pi + integral from 0 to 1 of x^4(1-x)^4/1+x^2 = 22/7

**Physics**

2.3) The question says "range of speeds", so i was expecting a quadratic formula.( What do you mean by reversing mu?