# Calculus (Answer Check)

85,687 results, page 58

### calculus

Part of a circuit has two resistors connected in parallel as shown in the figure. R(1) is a constant resistor of 10 ohm, while R(2) is a variable resistor with resistance that varies at a rate of 2 ohms per minute. The total, or effective, resistance, R, provided by this ...

### spanish

IMPERFECTO o PRETERITO Termina las frases: 1. De nini, yo normalmente.... my answer pasaba el mato con mis amnigos 2. Yo hacias la tarea cuando de repente el telefono my answer sonabamos 3. Mis padres miriban la television cuando yo... my answer havegabamos internet 4. El ...

### Math....Please help I have a deadline for tonight!

Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27… to find the following: b) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms? Carry all calculations to 6 decimals on all assignments. Answer: Show work in ...

### CHEMISTRY

Given the following heats of combustion. CH3OH(l) + 3/2 O2(g) -> CO2(g) + 2 H2O(l) ΔH°rxn = -726.4 kJ C(graphite) + O2(g) ->CO2(g) ΔH°rxn = -393.5 kJ H2(g) + 1/2 O2(g) -> H2O(l) ΔH°rxn = -285.8 kJ Calculate the enthalpy of formation of methanol (...

### Algebra

Hi this question was already asked but there is still no correct answer. I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks The equation is: .05x-.6(x+2)=.08 Please show the work as...

### English

Writeacher,can you please check if everything is correct? Thank you. 1) Can you give me a hand to finish this exercise, please? 2) The answer to your question is on he tip of my tongue. 3) Behave yourself! Don't shrug your shoulders! 4) I can't see at a distance. I think you ...

### Math Please help Ms. Sue

How can you determine if the given lines are perpendicular? Line 1: (-1,3) and (3,-3) Line 2: (-3,0) and (3,3) A)determine if they have slopes with opposite values*** B)determine if they have the same slope C)determine if the product of their slope is 1 D)determine if the ...

### Calculus check

The functions f and g are given by f(x)=sqrt(x^3) and g(x)=16-2x. Let R be the region bounded by the x-axis and the graphs of f and g. A. Find the area of R. B. The region R from x=0 to x=4 is rotated about the line x=4. Write, but do not evaluate, an integral expression the ...

### Career Explorations - Please Check My Answer

Please help me with the following questions: Nichole has been a police dispatcher who answers 911 calls. After working in this position in the police department for a while, she decides that she wants to become a police officer. Nichole would like to change her A. job pathway...

### Math check please

2 rectangles have equal areas determine the area of each rectangle then use this info to determine the perimeter. rectangle one: length of 2p + 3 width of 3.8 after my work i got p= 1.5 so the area is 14.4 and the perimeter is 19.6 is it correct? rectangle 2 : length of 6-p ...

### calc check: hooke's law

A force of 27N is required to maintain a spring stretched from its natural length of 12cm to a length of 15cm. How much work is done in stretching the spring from 15 to 25cm? and this is what i did.. please check to see if i did it correctly.. thanks :) f=27N 12cm to 15cm f(x...

### CHEMISTRY HELP !!!! CHECK !!!

Al3+ is reduced to Al(s) at an electrode. If a current of 2.75 ampere is passed for 36 hours, what mass of aluminum is deposited at the electrode? Assume 100% current efficiency. a. 9.2 x 10–3 g b. 3.3 x 101 g c. 9.9 x 101 g d. 1.0 x 102 g e. 3.0 x 102 g Answer 2.75 A for 36...

### World History Answer Check (Ms. Sue)

What group do Aristotle and Plato agree would make poor rulers? Why? A: Both authors agree that the rich would make poor rulers because, given that most lacked good and happiness in their lives, the wealthy would most likely set about fighting for power, bringing conflict that...

### Pre-Calculus

If you solve the following system of equations by substitution, which statement is true? x = z x - 2y + z = 6 2x + y - 2z = 1 A. You can substitute z for x into the second and third equations. B. You can substitute x for z into the second and third equations. C. Both methods ...

### Calculus

Consider the function f(x)=xlnx. For the following questions, write inf for ∞, -inf for −∞, and None if no such answer exists. a.) The domain of this function is . b.) The x-intercept is . c.) f′(x) = . d.) f(x) is increasing on the interval and ...

### International Business: Please Check Answer

Hi, Please help me! I need to know is these is the correct answer for these questions. Thanks for your help! Some countries try to hold the value of their currency within some range against an important reference currency. This is referred to as what? a. A dirty-float system. ...

### dog behavior

Please check my answer thanks so much :) When training a dog in a new command, when should you give the dog its treat? A. As soon as it completes the target behavior B. As you give the release signal C. As you give the target command signal D. When it's just beginning to ...

### Calculus

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 80 ft is given by the following. y = 150 - (1/40)(x-50)^2 Find the distance traveled by the kite. y = 150 - (1/40)(x-50)^2 y = 150 - (1/40)(x-50)(x-50) y = 150 - (1/40)x^2...

### Personal Finance

You and your spouse both have good retirement plans through work, and both receive social security checks based on your own incomes. If your goal is to maximize the size of your annuity check everymonth which option should you choose? A. Single Life Annuity B. Annuity for Life...

### Calculus

fter a foreign substance is introduced into the blood, the rate at which antibodies are made is modeled by f(t) = 27 t/8 t^2 + 3 where f(t) is in thousands of antibodies per minute, and t is measured in minutes with 0 ≤ t ≤ 60. Assuming that there are no antibodies...

### Word Problem

I have a couple of questions. Could you please check one of them and help me with one? 1. You have a 256 feet of fencing to enclose a retangular region. Find the demensions of the rectangle that maximize the enclosed area? This is what I did: a=xy 2x+2y=236 I subtacted 2x from...

### Repost- Calculus; someone please help

Please help out. Thank you. A right triangle has one leg on the x-axis. The vertex at the right end of that leg is at the point (3,0). The other vertex touches the graph os y=e^x. the entire triangle is to lie in the first quadrant. Find the maximum area of this triangle....

### Calculus 12th grade (double check my work please)

1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)<<<< my choice B.)3e^-2x sec(3x)tan (3x)-2xe^-2x sec(3x) C.)3e^-2x sec(3x)tan (x)-2e^-2x Sec(3x) D.)3e^-2x sec(3x)tan (x)-2xe^-2x sec(3x) 2.)calculate dy/dx if...

### cultural diversity

1. Prejudicial behaviors by young children, particularly in the 3 to 5 year age group, are not rooted in: A. Cognitive inability to fit new information and experiences into an existing belief system B. Observation and emulation of pro-social attitudes and behaviors on the part...

### French

We just learned about the pronouns leur and lui. I really don't understand them but I attempted the homework so could you please check these thanks. Part 1 Directions: Rewrite each sentence replacing the italicized words with a pronoun. (the italicized word I will put in ...

### Calculus

Determine the polar form of the complex number 3 - 2i. Express the angle theta in degrees, where 0 < theta < 360°, and round numerical entries in the answer to two decimal places. 326.31(cos 326.31° – isin 326.31°) 3.61(cos 326.31° – isin 326.31°) 326.31(cos ...

### English(last one-please check)

For the book, The Five People You Meet in Heaven, I have to answer this question: Q- 1. SETTING: give the time, place, and lenghth of the story. A- time: from Sunday to Friday; from the 1920s to a little before present-day; it begins at the end (Eddie's death) and continues on...

### English - check my answer, please.

"When they came to our house to visit, although they had never met either of us before, the governor and his wife were nice to my sister and I." This statement: (Points : 1) includes an inappropriate use of a comma. includes a lack of agreement between subject and predicate. ...

### math

What is the line of thought or sequence of thought for solving simple algebraic expressions? When I'm asked to solve the expression (5k)k^3....first I check with my list of exponent rules, and there are always a few that could be used to solve the expression.I just don't know ...

### 7th grade Science

Can you check my answer below, please? Elizabeth did an experiment to test the effect of salt water on rusting rate of a nail. She put 3 nails in the same bowl of salt for one week. How could she improve her experiment? Ans: 1) place each nail in a separate bowl with different...

### Geog

In one minute of time how far does the earth rotate in minutes or seconds of longitude? Please use the answer I posted in my last answer to calculate this answer.

### Math

Can someone tell me how they got the answer. Problem: 9^(x+6)=7x My answer was: -52.458 The correct answer is: -51.138 I have checked my input on my calculator, and cannot figure it out.

### algebra

The square that I am supposed to complete is x^2+15x, and the answer is (x+15/2)^2. How does this answer account for the 15 separate from the 15^2? I am confuzzled. Same thing goes for x^2-7x the answer is (x-7/2)^2, but I don't see what happened to the original -7. Thanks for...

### Math

How do you solve this? I have tryed so many times and can not get the right answer. (1.65-1.05)^2/0.4+0.8 The answer is suppose to be 1.7 but everytime I do the problem i don't get anything near that answer. Help would be greatly appreciated.

### gr.10 math

could you please show me the steps to solve this equation?I looked at the answer in the back of our textbook but i keep getting the wrong answer. 5(2y+1)-(5y-2) answer=5y+7. thanks so much!

### Math

Convert this measurement to hundreth of a kilometre. 26 mi 385 yd. Could you please show formula on how you got this answer? I am stuck I keep getting the answer as 16 km but the answer is supposed to be 42.19 km Thank you

### Math

Use distributive property and simplify the expression. 4 + 2(3x - 1) + 9 - 6x + 15 - 5x + 14 - 3x + 14 - 6x + 11 *my answer* I wanna make sure my answer is right. 3.82e+7 (there is no multiple choice) my answer is 38200000

### algebra 2

Subtract the following polynomials, then place the answer in the proper location on the grid. Write the answer in descending powers of x. (-6.7x2power + 2.3x y + 5.2) - (-14.9x 2 - 3.5x y + 7.1) my answer 8.2x2power+5.8xy-1.9

### Macroeconomics* Please check my answers*

If real GDP per capita grows at a rate of 5% per year consistently over time, how many years would it take for it to double in size? 5 10 My answer 14 70 The purpose of indexing Social Security payments to the CPI is to ______. increase corporate profits justify continued ...

### Calculus

Hello. I'm having problems with a couple of Calculus questions that involve maximums of geometric shapes. The first one is: 1. Find the dimensions and minimum volume of a right circular cone which can be circumscribed about a sphere of diameter 8. What I have is used similar ...

### SCIENCE

The most common ion dissolved in river water is chloride, carbonate, sodium, phosphate, or nitrate. I think the answer is sodium chloride but the answer has these two separated. Is the answer just sodium? No, the answer is not sodium. The answer is chloride ion. Later on in ...

### Precalculus(Please check and help)

Find the Equation. Please check the answers and help. Thanks! 1.) Ellipse with center (0,0), foci on x-axis; x intercepts; major axis of length 12, minor acis of length 8. I got : x^2/144 + y^2/64 = 1 2.) A parabola with vertex (0, 0) and focus (5, 0). I got : y^2 = 20x 3.) ...

### question

Which sentence has a preposition-related error? 1.There was a fight between the two men. 2.The Cerritos Center is near to my office. 3.They gave a party for Mary and me. 4.The report was sent to everyone except her. One of those sentences has TWO prepositions, next to one ...

### Calculus-math

If g(x) is the inverse of f(x), g(x)=f^-1(x), such that g(3)=5 and f'(5)=4 what is the value of g'(3)????? :O 2. If g(x)is the inverse of f(x), g(x)=f^-1(x), such that f(3)=15,f(6)=3,f'(3)=-8,and f'(6)=-2. What is the value of g'(3)???????? Calculus--

### Calculus

A small aircraft starts its descent from an altitude of 1 mile, 4 miles west of the runway. a) Find the cubic f(x) = ax3 + bx2 + cx + d on the interval [-4,0] that describes a smooth glide path for the landing. b) If the glide path of the plane is described by the function in ...

### Math

Lucia is hoping that Angela will buy her a geometrically interesting piece of land on which he will build a mansion. Lucia has said that she will only buy the land if it costs less than $4.00 per square foot. The plot shown below is listed for $453,175. Is Angela going to be ...

### Chemistry

The Solvay process for the manufacture of sodium carbonate begins by passing ammonia and carbon dioxide through a solution of sodium chloride to make sodium bicarbonate and ammonium chloride. The equation for this reaction is H2O + NaCl + NH3 + CO2 → NH4Cl + NaHCO3. In ...

### English

Can you please check these questions? Thank you very much. 1) Answer the following questions on literature. 2) Answer two of the following questions on the theme "fashion". 3)The Reformation derived (arouse?) from Henry VIII's quarrel with the Pope. 4)As a matter of fact, he ...

### Chemistry

Can someone just check this one for me? The neutralization reaction between Al(OH)3 and HNO3 produces a salt with the formula Al(NO3)3 + H2O Yes and no. It DOES produce a salt and that salt is Al(NO3)3 with the formula you have. However, the H2O, although a part of the ...

### math

solve and writein simplest terms: 3 yards 1 foot 10 inches+ 5 yards 2 feet 4 inches 8 yards 3 feet 14 inches 8 yds 4 feet 2 inches 9 yards 1 foot 2 inches. check that. you need to convert everything into inches 1 yard = 16 inches 1 foot = 12 inches The answer would be: 178 inches

### History

1) As a result of the Spanish American War, the US gained control of what country? A ) Cuba B) Puerto Rico. C) Spain D) Hawaii My Answer ~B 2) "Yellow Journalism" during the late 19th century was marked by A) Sensational headlines B) Exaggeration C) Not relying on facts D) All...

### Science Please Check

Please Check 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...

### Science 8A Check Answers

Will someone please check my answers as I need lots of help in science. 1. Which of the following is an example of matter? A. leaves B. shadow C. light from the sun* D. sound 2. Which of the following is an example of a chemical property of matter? A. ability to melt B. ...

### Pre Calculus

As x increases from p/4 to 3p/2, the value of sin(x) : A.increases throughout the interval B.decreases at first, then increases C.increases at first, then decreases D.decreases throughout the interval E.none of the above please explain why the answer is as it is, I don't ...

### English

Posted by rfvv on Tuesday, April 15, 2014 at 10:32pm. What will Sonya's family do this weekend? 1. They will plant potatoes. 2. Her family will plant potatoes. (Are both grammatical? Which answer is common?) ----------------- 1. On weekends what do Sonya and her family do? 2. ...

### American National Government

How does the other branches of government "check" the judicial branch in order to keep it from becoming too powerful? My answer is: The President puts forward the nomination for the judges and the Senate confirms them, this is considered to be a part of checks and balances. ...

### English

1. There are some naughty students in class. So you need to discipline them. What will you do if one student makes noisy during the class? - First, I will tell him to be quiet softly. If he continues making noise, I will make him stand at the back. If he doesn't listen to me ...

### English

1) If you listen to a normal conversation in English you will realise that large sections fall into (??) perfect iambs. An iamb is the most common stress pattern in English and consists of (is made up of??) an unstressed syllable followed by a stressed one. 2)Do you know where...

### Pre-Calculus

I posted this question about an hour ago, got a response but still confused. Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers ...

### LEA 201

Conduct an analysis of community policing with regard to the impacts pertaining to law enforcement administration. Thoroughly compare and contrast the aspects of community policing that are significantly influenced by the public interaction and political influence. As a police...

### Calculus

How would you begin this problem? On a standard summer day in upstate New York, the temperature outside can be modeled using the sinusoidal equation O(t) = 11 cos (pi/12 t) + 71, where t represents the number of hours since the peak temperature for the day. For 0 less than or ...

### calculus

Ice cream drips out of the bottom of an ice cream cone on a hot day at a rate of r(t) mL per second, as a child eats it slowly, where t is in seconds. If r(t) = 10 e^{-k t}, complete the definite integral expressing the quantity of ice cream lost in the first 3 minutes(s). (...

### Calculus 2

A spring has a natural length of 25 meters. A force of 12 newtons is required to stretch the spring to a length of 30 meters. How much work is done to stretch the spring from it's natural length to 40 meters? -I forgot to add the 40 meters part to my other question here is ...

### calculus

I've posted this question before and think I've made some progress but it some part of the second answer I got is wrong I've done the first question but I cannot get any farther. I'm so stuck. Please explain or just help me to figure out the next steps. A printed poster is to ...

### Computer Tech.

Can you help with this question? 5,000 megabytes is equal to how many gigabytes? Check this site and multiply by 5,000. http://malektips.com/computer_memory_definitions_0003.html I looked at the site but I am confused. please help! 1,000 megabytes equals 1 gigabyte. Therefore...

### language arts check answers please(5 Qs)

please check my answers and thanks so much. Choose the best answer for each question. 1. if a person is given fanfare,which is most likely to happen ? A. he gives his friend a hug. B. he is sent tojail C. he receives a letter D. he is greeted by a cheering crowd. (i picked ...

### chemistry titration (check my thought process)

can someone check my answers here for my lab... so i have 3.234*10-4 moles of ca2+ and mg2+ ions and used 0.02450L of edta so my molarity of both ions is 0.01320 M. and now we had to find calcium, i used 0.01655 L of edta, can i use the same # of moles (3.234*10^-4) to find ...

### English-(PLEASE CHECK)

How does George show he protects Lennie when they meet the boss? My Answer- George answers all of the boss' questions himself to prevent the boss from finding out that Lennie was crazy and not smart and then not giving them jobs. Also, George tells the boss what a good strong ...

### chemistry

I tried using the answer you provided but the online system I am using is not taking this as a correct answer. This is the answer you provided: AgCl(s) + H2O(l) ==> Ag^+(aq) + Cl^-(aq). PLEASE HELP!! Thanks My original question: Write the equation for the dissolution of ...

### Socias Studies

which of the following is an advantage of a presidential government? A. the president is elected independently of the legislative brach B. The president is part of the legislative branch C. A system of checks and balances increases legislative power D. A system of checks and ...

### Spanish

Can someone check my work? English: My cousin came over to play. We were running around the living room. My brother and cousin crashed into each other. And my brother cut the corner of his eye open. Spanish: Mi primo vino a casa jugar. Fuimos correr alrededer de la sala. Mi ...

### math

please check my answer thanks :) What is Eric's gross pay , including overtime and double time He earns $9.24 per hour He gets time and a half for over time and double time for work on Saturday He worked 52 hours this week, with 8 hours overtime and for hours on Saturday $9.24...

### Math word problem check

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem? I used the formula of V = D/T T = D/V, you know that 78.2...

### Basic Finance Risk vs Return

Please check and correct my answers. Investors want ____ returns and ___ risk. Answer: high return, low risk Which statement about the efficient set, minimum-variance set and feasible is incorrect? a) the minimum variance is the set of all portfolios with the lowest variance ...

### Enlgish

1. What was your parents' dream? 1-1. They all wanted to be a singer. 1-2. They all wanted to be singers. (Which answer is correct? Do I have to use a singular noun or a plural noun?) 2. What did you give to your parents on Parents' Day? 2-1. I gave them a flower. 2-2. I gave ...

### math

I need help rounding 423,607,492 to the following place values. ten thousands million Please tell us what you think, and we'll be glad to comment on your answers. Starting at the ten thousands digit, it is now 07,492, so rounding it to the nearest, is one ten thousand 10,000 ...

### Accounting help

Bank Reconciliation Prepare a bank reconciliation as of October 31 send the following information: a. October 31 cash balance in the general ledger is $1688. b. The October 31 balance Sean thinks statement is $746. c. Checks issued but not returned with the bank statement ...

### PHYSICS answer check

A 25 gram arrow fired from a bow has a speed of 80m/s. The energy in the arrow came from work done by the bow that acted over a 1m "draw" distance. What average force acted on the arrow over this distance mass=0.025kg speed=80m/s avg force 2N

### Calculus (Partial Derivatives)

Using x hours of skilled labor and y hours of unskilled labor, a manufacturer can produce Q(x,y)=40xy1/5 units each week. Currently 20 hours of skilled labor and 243 hours of unskilled labor are being used. Suppose the manufacturer reduces the skilled labor level by 2 hours ...

### Biology (Answer Check)

State how comparing the amino acid sequence of a protein can provide evident that evolution has taken place. A: If evolution has taken place, then, in general, species descended from a recent common ancestor should have fewer amino acid differences between their proteins than ...

### Chem. Could someone check my answer.

(1) To make NaTcO4, Tc metal is dissolved in nitric acid to make HTcO4, NO2 and H2O. Then the product HTcO4 is treated with NaOH to make NaTcO4. If you begin with 4.5 mg of Tc metal, how much of NaOH (in grams) is required to convert all of the HTcO4 into NaTcO4? Tc + 7HNO3 = ...

### Calculus

You are in a boat "a" miles from the nearest point on the coast. You are to go to a point Q, which is "b" miles down the coast and 1 mile inland. You can row at 2 miles per hour and walk at 4 miles per hour. If a=3, and b=4, toward what point on the coast should you row in ...

### Math-- Ms. Sue??

You are designing a rectangular playground. ON YOUR SCALE DRAWING, THE VERTICES OF THE RECTANGLE ARE (6,3), (6,5), AND (8,3). wHAT ARE THE COORDINATES OF THE FOURTH VERTEX? 1: (4,5) 2: (8,5) 3: (8,1) 4: (5,8) <- My answer Determine which ordered pair is NOT a solution of y...

### economic

1)If the transactions approach to measuring money is used, then the money supply consists of a. transaction deposits only. b. currency, checkable and debitable deposits, and traveler's checks. c. currency and transaction deposits only. d. currency only. 2)Transaction deposits ...

### calculus

Use the demand function X=325(1-(6p/7p+4)) to find the rate of change in the demand x for the given price p=$5.00. Round your answer to two decimal places. A. 5.13 UNITS PER DOLLAR B. -0.85 UNITS PER DOLLAR C. 0.85 UNITS PER DOLLAR D. 1.35 UNITS PER DOLLAR E. -5.13 UNITS PER ...

### mathmatics probability

I am having with the following questions and was wondering if someone might be able to show me a step by step solution to arrive at the answer. They are from Probablity and Statistics for Enginnering and the Sciences by Jay Devore 6th Edition 62) An airport limousine can ...

### calculus

"superman is in level flight 6 miles above ground. his flight plan takes him directly over whs high school. how fast is he flying when the distance between him and the whs high school is exactly 10 miles and the rate is increasing 40mph?" i keep getting: r = 10 r'=40 y=6 x=8 x...

### Math

Find the solution of the equation. 1. 2x=12 answer: x=6 2. 4x=20 answer: x=5 Did I answer these correctly?

### math

Let f(x)= 4 and g(x)= ãx-2 : X2 - 4 f o g(11)=ANSWER: Square root X-2/ 11-2 =ã9=3 4/32 -4 = 4/5 f o f(0)=ANSWER Determine the Domain of f o g=ANSWER:

### math

WHAT IS 6 2/3+[3 1/3+7 1/3] = I THOUGHT IT = 16 4/3 IF I AM CORRECT THE ANSWER IS NOT THERE DO SIMPLIFY THE ANSWER WOULD THE ANSWER BE

### English

Need to correct the verb if not correct and if correct just leave. Thanks for looking at this for me... 1. King Arthur LEARNED about the magic sword from Merlin the magician. ANSWER=correct 2. My older sister LEARNED me to read when I was in kindergarten. ANSWER=taught 3. ...

### Calculus

Following 2 questions are from a book at a point where L’Hopital’s Rule, Squeeze Theorem etc. have not been discussed and limits (A) and (B) as given below are to be evaluated by simple methods like algebraic simplification etc. 1. Int. of (xlogx)dx from 0 to 1. Indefinite...

### Calculus

Following 2 questions are from a book at a point where L’Hopital’s Rule, Squeeze Theorem etc. have not been discussed and limits (A) and (B) as given below are to be evaluated by simple methods like algebraic simplification etc. 1. Int. of (xlogx)dx from 0 to 1. Indefinite...

### Algebra

Can someone tell me how they got the answer? Find a polynomial equation with real coefficients that has the given roots. 4i, sqrt5 my answer: x^4-22x^2+80=0 correct answer: x^4+11x^2-80=0

### math

Compare fractions-write in order least to greatest. My daughter wrote them incorrectly at first, then we found what the answer should be, but can you explain to her why the answers are what they are. Thank you. 1. 2/5, 1/10, 3/20 answer----1/10, 3/20, 2/5 2. 1/3, 3/8, 2/9 ...

### math

Compare fractions-write in order least to greatest. My daughter wrote them incorrectly at first, then we found what the answer should be, but can you explain to her why the answers are what they are. Thank you. 1. 2/5, 1/10, 3/20 answer----1/10, 3/20, 2/5 2. 1/3, 3/8, 2/9 ...

### algebra2

I am taking an online class, and cant understand why when I calculate ona ti84 plus an answer I get decimal answer and my teachers answer is sq root, is there something I am not doing on my calculator? How do I convert.

### science

1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get this answer. I've looked it up and stuff, but I just found the answer not how to know what it is. A link or explanation would be greatly appreciated. Thanks.

### Math

I need to find expressions that will show how 5 x 37 can be rewritten using distributive property. 5 x 30 + 7 ---- My answer 5 x 30 + 5 x 7 5 x 40 - 5 x 7 5 x 40 - 5 x 3 *It can be more than one answer* 3u + 7v + 4u = 2v (I have to simplify) My answer is 7u + 9v because 4+3 ...