# Posts by Emily

Total # Posts: 3,062

calculus
D. Plugging 2 into original fxn gives you y-coordinate. (2,6) Taking the derivative of y=(x^3)-x gives you f'(x)=3x^2-1. Plug in x=2 to find slope. use point slope form to get equation! :)

Math
sin^2 theta + 2 cos theta -1/ (sin^2 theta +3 cos theta-3= cos^2 theta+cos theta/ (-sin^2 theta) Prove the identity.

chemistry
Formula for specific heat:q/(m * delta t) Input given data: 35.2 J/(4.0 g * 20 c) Solve: 0.44 J/(g*c)

Biology-Respiratory System
What's the difference between capillaries, pulmonary artery and pulmonary vein?

Math
Prove this identity. State any restrictions on the variables. sin x/(tan x)= cos x

Physics
A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was using the equation ...

Physics
A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was using the equation ...

Math
Determine whether each general term defines a geometric sequence. Explain. a) f(n)= 2/(3n+1) b) f(n)= 11/(13^n)

math
I Don't know

measure the perimeter to the nearest 1/2cm.

statistics
An Urn contains 7 red and 3 white balls. Two balls are drawn in succession without replacement. If the second ball is white, what is the probability that the first ball was white?

what i think the legal age 4 drinking should be

Algebra 2
Need help on the #13-20. 13. What is the quotient of d − 2 ) d 4 − 6d 3 + d + 17 __________________ ? A. d 3 − 4d 2 − 8d − 15 R −13 B. d 3 − 8d 2 + 16d − 31 R 79 C. d 3 − 4d 2 + 9d + 35 D. d 3 − 8d 2 + 17d − 17 ...

chemistry
if you combust 30kg of octane (about the amount in one tank for a small car), how many kilograms of CO2 will you emit?

chem 2
What concentration of NaF is required in order to convert a 0.15M HF solution to a buffer with a pH of 5.50?

Math
Given angle theta is bigger than 0 and smaller than 360, determine two possible values of theta where each ration would be true. a) cos theta= 0.6951 b)sin theta= -0.7571

Math
Use the related acute angle to state an equivalent expression: a) tan 110 degrees b)sin 350 degrees

Biology

chemistry
How much energy (in kilojoules) is needed to heat 5.45g of ice from -12.0 C to 32.0 C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K x mol) for ice and 75.3 J/(k x mol) for liquid water

Biology
What is the lumen of the human digestive system?

Physics
how many sig figs do you use for estimated absolute uncertainties?

Math
Is RESP a form of annuity?

physics
A record player is spinning at 32 rpm when the motor is switched off. After 6.8 seconds the angular speed has decreased to 20 rpm. Calculate the frictional torque if the record player can be treated as a solid wheel of mass 2.4 kg and radius 15 cm. A) 476.47059 Nm B) 0.00499 ...

need physics help
2.1=0(.6)+.5(a)(.6^2) you can get drop the vit since vi=0. that will leave you with 2.1=.5a.6^2 multiply (.5)6^2 then you can divide 2.1 with the answer you got.

The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 6.0 rev/s in 12.0 s. At this point the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub slows to rest in 11.0 s. Through how many ...

Math
Thanks!

Math
The hypotenuse of,c of right triangle ABC is 7.0 m long. A trigonometric ratio for angle A is given for four different triangles. Which one of these triangles has the greatest area? Justify your decision. a)sec A=1.7105 b)cos A=0.7512 c) csc A=2.2703 d)sin A= 0.1515

Math
In simple annuities, why is the amount of payment for the first deposit R(1+i)^n-1? Shouldn't it be n?

how much water vapor is in 15 C

math
in addition to x=0, x=7 2[2x-7]+11=25 2[2x-7]=14 [2x-7]=7 2x=14 x=7 Check 2[2(7)-7]+11=25 2[7]+11=25 14+11=25 25=25 :D

math
You want to get the absolute value portion of the equation alone first. They you can find what x would equal if it were (2x-7) = blah and if -(2x-7) = blah.

Math
Nevermind, I was able to do it with synthetic division.

Math
How would I find the zeros of the function x^3 -7x +6 ? I know how to do with a x^2 term but, I'm confused as to how to do it when there isn't an x^2.

Math
In a geometric series, t1=12 and S3=372. What is the greatest possible value for t5? Justify your answer.

Math
cent, cent, scent equals 35128; how do you solve it?

Math
The 10th term of an arithmetic series is 34, and the sum of the first 20 terms is 710. Determine the 25th term.

Science
A gas filled balloon having a volume of 3.0 L at 1.1 atmosphere of pressure and a temperature of 22 C is allowed to rise into the stratosphere where the temperature and pressure are: - 28 C (note the negative sign) and 0.002 atmospheres , respectively. What is the approximate ...

Calculus
The volume of a cone of a radius r and height h is given by V=(3.14/3)(r^2)(h). If the radius and the height both increase at a constant rate of .5 cm per second, at what rate, in cubic cm per second, is the volume increasing when the height is 9cm and the radius is 6cm.

Science
Is sugar a covalent or ionic compound?

Math
why do you let n=1, 2 and 3?

Math
How do you get the general term for a sequence that has increasing common differences? For example: 1,2,4,7,11

Math
Thanks!

Math
Determine the 10th term of the sequence 3, 10, 28, 72, 176... State the general term.

social studies
guarentee

social studies
you should always read the ______ before you a buy a product... answer is 9 letters long third letter is an a...

social studies
if you own a factory the factory and any equipment in it are part of your... answer is 7 letters fourth letter is an i... i have been through everything in my study guide and cannot find the answer for this one...

1
omg i absolutely love you bobpursley! thankss for the help as well. =]

Accounting
I have a problem with management accounting However, I have trouble posting the question here Is it possible that i can send it to someone for their assistance

Math(geometric sequences)
sorry i meant 4

Math(geometric sequences)
sorry i subbed 10 into it, and it was wrong.

Math(geometric sequences)
A certain antibiotic reduces the number of bacteria in your body by 10% each does. a)If four does of the antibiotic are taken, what percent of the original bacterial population is left? I think the formula is supposed to be tn=100(9/10)^-1, but when i substituted 1 into it, ...

US History
1 b 2 c 3 a 4 d

I don't now

what are some examples of colloids? like a mixture,compound or sometin.... im looking for something like a colloid is water and oil mixed together and so on. thx :)

In the past, Lucy was a great singer.

chemistry
Light with a wavelength of 405 nm fell on a strontium surface, and electrons were ejected. If the speed of an ejected electron is 3.49 105 m/s, what energy was expended in removing the electron from the metal? Express the answer in joules (per electron) and in kilojoules per ...

chemistry
Calculate the shortest wavelength of visible light (in nanometers) seen in the spectrum of the hydrogen atom. nm What are the principle quantum numbers for the levels in this transition?

chemistry
What is the wavelength of the transition from n = 2 to n = 1 for Li2+? Li2+ is a hydrogen-like ion. Such an ion has a nucleus of charge +Ze and a single electron outside this nucleus. The energy levels of the ion are -Z2RH/n2, where Z is the atomic number. nm In what region of...

chemistry
What is the de Broglie wavelength of an oxygen molecule, O2, traveling at 503 m/s?

chemistry
Calculate the frequency of electromagnetic radiation emitted by the hydrogen atom in the electron transition from n = 7 to n = 6.

math
jasmine is helping her father plant trees to create a border around their back yard jasmine plants a treesevery 25 and her father plants a tree every 15 minutes if they started together how long before they would finsh planting a treee at the same time

math
slove the folowing eqaution negtive 23=x+35

geometry
the quadrilateral has a pweimeter of 60 meters. mp and no are congruent the length of mn is 10 meters and the length of no is 15 meters what is the length of po

analytical chemistry
blank is used to dissipate the error brought about by impurities. What is the other reason of using blank in Mohr method?

English
I have a few question on linking verbs: 1. I am fond of both kinds of comics. linking verb - fond? 2. Joseph Pulitzer was the first to publish color funnies. linking verb - was? 3. The sales of his newspaper were high. linking verb - sales 4. Sunday Funnies soon became part of...

physics
What is the approximate mass of air in a living room 6.0 m times 3.9 m times 2.7 m?

PHYSICS ---HELP!
Suppose there is a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, there is an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are...

Suppose there is a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, there is an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and the surfaces are...

chemistry
How much heat is released when a mixture containing 12.6 g CS2 and 12.6 g Cl2 reacts by the following equation? CS2(g) + 3 Cl2(g) → S2Cl2(g) + CCl4(g) ΔH° = −230. kJ

chemistry
How many grams of oxygen gas are required to produce 7.46 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Liquid water has a heat of vaporization of 44.0 kJ per mole at 25°C.

chemistry
Calculate the heat released when 4.260 L Cl2 with a density of 2.46 g/L at 25°C reacts with an excess of sodium metal to form solid sodium chloride at 25°C.

chemistry
A 19.5-g sample of a metal was heated to 61.67°C. When the metal was placed into 26.5 g of water in a calorimeter, the temperature of the water increased from 25.00°C to 30.00°C. What is the specific heat of the metal?

Chemistry
Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical equations. N2(g) + 3 H2(g) → 2 NH3(g) Δ...

Math
An auditorium has 50 rows of seats. The first row has 20 seats, the second row has 21, the third row has 22 seats, and so on, each row having one more seat than the previous row. How many seats are there all together? a. write 2 different expressions for the total number of ...

trig
If a=8, the angle C=50 degrees and the angle A=35 degrees find the other angle B and the remaining b and c sides. Give your answer to at least 3 decimal places.

physics
Consider a hoola-hoop of radius R and it is spinning about its symmetry axis at a constant angular velocity. Now, I double its mass and halve its angular velocity. What is the new angular momentum in terms of the initial angular momentum?

physics
With acceleration of 2500 m/s2, how long will it take to rreach speed of light

physics
With acceleration of 2500 m/s2, how long will it take to rreach speed of light

English
Thank you so much. I think I get it!

English
Zoo keepers harvest bamboo for Pandas harvest = transitive? In China people eat the tender shoots as a vegetable. eat = transitive?

English
last two, I think I am getting it... Zoo keepers harvest bamboo for Pandas harvest = transitive? In China people eat the tender shoots as a vegetable. eat = intransitive?

English
Asian farmers live in bamboo houses? live = intransitive? Their sandals are made from bamboo strips. made = intransitive? Peoples sometimes sleep on bamboo mats. sleep = intransitive? In some countries, bamboo cages hold animals. hold = transitive?

English
Asian farmers live in bamboo houses? live = transitive? Their sandals are made from bamboo strips. made = transitive? Peoples sometimes sleep on bamboo mats. sleep = transitive? In some countries, bamboo cages hold animals. hold = transitive?

English
The Size might suprise you. suprise = transitive Some reach a height of 120 feet. reach = transitive The Japanese also make flutes from these stems. make - transitive

English
I am trying to figure out transitive or intransitive.... It is related to wheat, oats and barley. related = intransitive? The stems measure a foot in diameter. measures - transitive? Engineers strengthen concrete with it. Intransitive?

Chemistry
What is the temperature (in kelvins) at which 0.0260 mol occupies 1.00 L at 0.563 atm?

Biology
also located on the X chromosome is a gene that codes for deafness. This gene is recessive. a black female cat that is heterozygous for deafness (Dd) is crossed with a yellow cat that is not deaf What is the Punnet Square . and must use two letters on the x chromosome

algebra
what does x equal in this equation?1/2+7x/10=13/20

Biology
Thanks

Biology
Why do we perform aerobic respiration when we're resting and both aerobic and anaerobic respiration while we're running?

math
A low ha this paper sux ):

math
352\$ for mae assurian and sally got \$4.44 cents for 148 newspapers.

Applied statistics for business and economics
I apologize, 3 of the above answers are not correct. * a. 0.0498 * b. 0.0000 c. correct * d. 0.0038 e. correct f. correct

Applied statistics for business and economics
a. 0.9998 b. 0.0002 c. 0.0504 d. 0.0224 e. 3 cards f. 1.731877594 (rounded 1.7319)

Math
Thank you!

Math
For what values of k does the function f(x)=(k+1)x^2+2kx+k-1 have no zeros? One zero? Two zeros?

Physics
average acceleration in m/s squared

Physics
A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

Physics
A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

Physics
If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?