# Posts by maya

Total # Posts: 629

general science
0.o8

A helicopter is ascending vertically with a speed of 5.20m/s . At a height of 110m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: for the package equals the speed of the helicopter.]

Pre-calc
Could you possibly elabarate a little on to how you got those numbers please :) thanks you!

Pre-calc
An investment firm has a job opening with a salary o \$30,000 for the first year. Suppose that during the next 39 years, there is a 5% raise each year. Find the total compensation over the 40-year period.

CHEMISTRY
A second-order reaction has a rate constant of 1.65 M–1 s–1. If the initial reactant concentration is 1.0 M, calculate the time (in seconds) required for the reaction to become 90% complete. i got 0.06734 seconds but that's incorrect i have no idea what i am ...

Math
Is it reasonable to interpret -16 & + 11 have the sum of 5. If not please explain

Math
A sphere is inscribed in a right cone. The slant height of the cone = the diameter of the base of cone. If the radius of the sphere is r, find the volume of the cone in terms of r.

math
explain how you could use grid paper to draw a rectangle with a perimeter of 18 units

English
Original sentence: The urgent care center offers a variety of services such as physician appointments, mental health, health education programs, and lab and X-ray work. My corrections: The urgent care center offers physician appointments, mental health evaluations, health ...

Math
Ned caught 1/3 pound of fish. Sarah caught 5/12 pound of fish. Jessica caught 1/6 pound of fish. Which diagram shows how to find how many pounds of fish they caught altogether. 2/6 2/6 1/6 3/12 5/12 6/12 1/3 5/12 1/6 1/12 5/12 1/12

Math
Ms. Sue. Are any of them correct

Math
Ned caught 1/3 pound of fish. Sarah caught 5/12 pound of fish. Jessica caught 1/6 pound of fish. Which diagram shows how to find how many pounds of fish they caught altogether. 2/6 2/6 1/6 3/12 5/12 6/12 1/3 5/12 1/6 1/12 5/12 1/12

Math

math
Katie is 3/5 of the way to Brianna's house. Larry is 7/10 of the way to Brianna's house. How much closer to Brianna's house is larry

Math
Glenda wrote 1/7 of her paper on Monday, 1/14 of her paper on Tuesday, and 2/28 of her paper on Wednesday. She said she wrote more than half of her paper. Is she correct? Why or why not?

Math
Glenda wrote 1/7 of her paper on Monday, 1/14 of her paper on Tuesday, and 2.28 of her paper on Wednesday. She said she wrote more than half of her paper. Is she correct? Why or why not?

English
What does the things you carry say about you? The things we carry is largely determined by ________.

math
If you have a calulator TI-30XIIs put in your numbers 3474.8 on your upper left side press 2nd button;next press the button the right (DRG) the screen will flash the following: FLO SCI ENG with your right arrow(far right side) set it to SCI (scientific mode) press = and it ...

algebra
x+9>12 x+9-9>12-9 x>3

algebra
yes

organic chem
Thank you DrBob It makes sense since the PI(point of inflection)is calculated by adding the two pk values and dividing it by 2...Pk1/2+ Pk2/2= PI

organic chem
In the Titration of amino acids Glycine and Lysine Which data can be obtained with greater accuracy? 1.the pK values from the "legs" ? 2.the isoleric point from the point of inflection?

I NEED HELP FINDING THE VARIABLE FOR THE FOLLOWING:57-BLANK-BLANK-33-BLANK-17

organic chem
Which data can be obtained with greater accuracy-the pK values from the "legs" or the isoleric point from the point of inflection? Titration of amino acids Glycine and Lysine

ALGEBRA
Combine and Simplify 2 + t/t-3 - 18/t^2-9 - Please explain

math146
8-3 ... thank u ..

math146
equation for subtract the result in C form the result in A ... is it C - A

chemistry ASAP
okay , the website you put does not work. But one last question. for sodium hydrogen arsenate it says to give the correct formula. how do i go about doing that? how do i start? i know that sodium is Na and that arsenate is AsO4^3-

chemistry ASAP
i ran into a problem that is tin(IV)dichromate i thought the answer was SN2(Cr2O7)4 but the book says the answer is SN(Cr2O7)2 CAN YOU PLEASE EXPLAIN WHY??

chemistry ASAP
can anybody please explain nomenclature to me ? how to name? for example: Na3PO3 NH4CLO2 AuNO2

chemistry
can anybody please explain nomenclature to me ? how to name? for example: Na3PO3 NH4CLO2 AuNO2

physics
A project is fire at angale of 45 with x-axis with the K.E 100J what is its K.E energy at maximum height?

Pre-Agbra
never mind

chemistry
Write "oxidation" before the reaction below which is anoxidation reaction; write "reduction" before the reaction belowwhich is a reduction reaction. a.____________________ Na----> Na+ (small+) + e- b.____________________ Cl + e- ----> Cl- What does it...

25 kg of ice at 0° C is combined with 4 kg of steam at 100° C. What is the final equilibrium temperature in ° C of the system? (Lf = 3.33 x 105 J/kg; Lv 2.26 x 106 J/kg, specific heat capacity of water =4186 J/(kg.K)) Question 2 options: A) 40 B) 20 C) 60 D) 100 E) 8

Math
A spherical balloon is being inflated so that its volume is increasing at the rate of 200 cm3/min. At what rate is the radius increasing when the radius is 15 cm.

Chemistry
:D thankyou very much for explaining it all, it seems i was treating the 0.2^1/2 as 0.2*0.5 (being half of one...so wrong!). To get 0.4472 though, 0.2 needs *2.236, it dawned to me as 2.24, bringing so3 to 62.4g after rounding. I promise to practice my algebra. I appreciate ...

Chemistry
I thought so2 would be 0.4, I didn't have so3 correct on my ice table. I get x as 0.485; 0.471(x-0.4)=(0.4)(0.2)^1/2 0.471x-0.1884=0.04 0.471x=0.2284 But x needs to be 1.18 for so3 to be 0.78M(1.18 - 0.4) to multiply with 80, am i missing something?

Chemistry
equilibrium constant for; so3 <----> so2 + 1/2o2 is found to be 0.471M^1/2 @ 600deg C after a quantity of sulfur trioxide is allowed to come to equilibrium in a 1L flask @ 600deg C, 0.2 mol oxygen was found to be present. What mass of sulfur trioxide was initially placed...

Chemistry
what is the proper name for (CH3)2CHCH(OH)CH3?

Chemistry
A certain headache relief tablet is composed of monoprotic acetylsalicylic acid(C9H8O4(s)) and an inert filler. A 4.00 g tablet was crushed and dissolved to make 40.0 mL of solution. The solution was then titrated with 0.900 mol/L NaOH(aq). The volume of NaOH(aq) needed to ...

chemistry
Help! The concentration of a solution of hydrochloric acid is 1•00 ± 0•05 mol dm−3 and the volume is 10•0 ± 0•1 cm3. Calculate the number of moles and state the absolute uncertainty.

trig
Ok, so im brand new at trigonometry. If i have a right triangle with an acute angle of 30° an opposite side of 4 and a hypotenuse of x how do ii find x

calculus
The tangent to y = (ax)+b/(sqrt x) at x =1 is 2x-y=1. Find a and b. help?

That is supposed to be 1/x sorry!

How would i go about solving this complex fraction? [(x/3)-4] / [5+(1x)]

Anatomy
hhhshhs

math
the number blank thirds is between 3 and 4. what could the numerator of this number be? explain your answer.

economic
supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expected. Using a method similar to the GDP deflator, compute the percentage change of the overall price level. Also use 2009 as ...

economic
supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expectedInflation during the 1970s was much higher than most people had expected when the decade began.How did this affect ...

economic
supposes that a borrower and a lender agree on the nominal interest rate to be paid on a loan. Then inflation turns out to be higher than they both expected.

Speechwriting
Hiya! Okay how can I introduce a speech without saying Goodmorning ladies and gentlemen? But not seem rude?

Social Studies
My pleasure

Algebra
I should just stop using this site... No one ever wants to help me anyways...

Algebra
I don't even know where to start with this problem... i'm supposed to simplify it but i don't get how, please help! 12e^x / e^4x I would really appreciate the help, thank you!

Algebra
ok i need help simplifying this problem. please :) 5e^x/6e it looks similar to this 5e^x ____ 6e Thanks!

statistics
At a church bazzar they have a game of chance that consists of picking a two digit number(0-9).You can bet 1\$ by picking a two digit number if you match two numbers you win 25\$ if you match one the numbers in the same order you win 3\$ if you bet 24 and 42 comes up you lose,but...

Algebra
OK THANKS!

Algebra
Thanks. What does that symbol mean? and how do i write it?

Algebra
Perform the indicated operation and state the domain. Let f(x)=x-1 and g(x)=x+1 f(x) - g(x) Heres my work (x-1) - (x+1) x-x=0 and -1-1=-2 Answer =-2 because the x's cancel each other out. How do i find the domain when there is no x in the answer?

physics
hkgfffc

algebra
use the Substitution Method. Please give it a try. y = 3x + 4 5x + 3y = 12 Why is the substitution method preferred in this case?

chemistry
0.03125M

Physics
100.32

physics
what is the prarticle diagram for the thermite reaction?

math
how do you solve: -3y=3x-9 and 2x-4y=12 and -3x=2y

math
wow thanks rieny :)

math
rieny that doesent make sense it cant be.

math
im in grade 4 i don't know what that is

math
the floor of a room is a rectangle. it has a perimeter of 22m and an area of 24 square meters. what are the length and width of the room?

physics
Speedometer readings are obtained and graphed below as a car comes to a stop along a straight-line path. How far does the car move between t = 0 and t = 14 s?

AM I RIGHT?
Ok i have done some more reading, and i get the feeling it was bad. Because it isolated the people from the rest of the Eastern EMpire? But i have to write an entire essay on this topic? what else can i say?

World History
There's too much information, my brain cant process it all. But i get the feeling it was good??

World History
What influence did the Mongol's Golden Horde have on the development of the Russian Empire? (Good or Bad?)

World History
Yes it does have to do with the Byzantine Empire because that's what we are studying right now...

World History
Well if you look at its geographical location does it seem like a lot of people would come there? (this is why i posted this Q, it doesnt make sense)

World History
Why is there such a wide diversity of people in Eastern Europe? What are some of the origins of these diverse groups?

math
slope = (y2-y1)/(x2-x1)=(8-0)/(-2+2) =8/0= infinity

Calculus BC
Find the volume if the region enclosing y=2x, y=0, x=3 is rotated a)about the y-axis b)about the line x=3 c)about the line x=4.

geometry
given: chord AB is parallel to chord CD prove if two chords of a circle are parallel, the two arcs between the chords are congruent. Prove: arc AC is congruent to arc BD

banyan elementary
Samantha has 7 tomato plants in 12 rows. How many tomato plants does she have? Solve using multiplication equations

math
i'm sorry i left out one part. "A rectangle is 4 times as long as it is wide. A 2nd rectangle is 5 centimeters longer and 2 centimeters wider than the first. The area of the second rectangle is 530 square centimeters greater than the first. What are the dimensions of ...

math
A rectangle is 4 times as long as it is wide. A 2nd rectangle is 5centimeters longer and 2 centimeters wider than the first. what are the dimensions of the original rectangle?

math
i have no idea how to do this...

What is the Antonym for the word RECIPE?

dressmaking
there are mistakes in those answers, I just did this test. here the correct answers 1. B (reference for study book 042014 PAGES 34, 35) 5. C (reference for study book 042014 PAGES 25-27)

math
rectangle A has length 12 cm and width 6 cm and while rectangle B has llength 8 cm and width 5 cm .find the ratio of the size of and angle of A to the size of an angle of B

Physics
How much time is needed for 5.0 N force to increase the speed of a 0.248 kg object from 12 m/s to 56 m/s?

Physics
How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?

Physics
How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?

Physics
How much time is needed to completely stop a 1600 kg car moving at 35 m/s if an average force of 4200 n is applied?

Calc
1. For what value(s) of x is f(x) = (x-1) / (x^2 - 1) discontinuous? 2.) f(x) = (1)/(x^2) is continuous for all real numbers EXCEPT: a. x=0 b. x=1 only c. x=1 and x=-1 d. x=-1 only e. x=2

English
What are some main points of rising action in the Scarlet Ibis?

Math
Find the equation that represents all of the points that are three times as far from (6,6) as they are from (2,0)

interesting log problem
sounds quite right to me. thanks!

interesting log problem
log base 2n 1944 = log base n (486* (2)^1/2) find n^6

Math hw
A corporation has 24 shareholders holding 4140 shares. The founder of the company retains 50 % of the companies shares. The remaining shares are equally divided among his 23 grandchildren. By the company's articles of incorporation, the voting weight for each partner is ...

Math help
A corporation has 30 shareholders holding 2900 shares. The founder of the company retains 50 % of the companies shares. The remaining shares are equally divided among his 29 grandchildren. By the company's articles of incorporation, the voting weight for each partner is ...

Calculus
is the region bounded by x=0? if no, then it is in fact infinite... if yes, then: 1) find the points of intersection. they are x = 1/2 and x = 0. 2) take the integral of pi*(4x^2)^2 from 0 to 1/2.

i need help with social stuides describe islam in the 600's

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