# Posts by James

Total # Posts: 2,461

math 1

math

math
ive got it ive seen my mistake

math
Find the values of x and y in the two equations below then answer the question that follows. 2^-3=1/x 7^y=1/49 What is the value of xy ? For the first problem i got 8. For the second one i got 1/343 I don't know what im doing wrong or right. Can you please show me with work.

Chemistry
Based on the standard reduction potentials given below, which species is most likely to be oxidized? Ag+ + e- → Ag, Eo= 0.80 V Cu2+ + 2e- → Cu, Eo= 0.34 V Zn2+ + 2e- → Zn, Eo= -0.76 V Cd2+ + 2e- → Cd, Eo= -0.40 V I thought the answer would be Zn2+ that...

Chemistery
Calculate the concentration of O 2 if K c = 270 for the reaction 2SO 2 (g)+O 2 (g)⇌2SO 3 (g) .

College Algebra
Tammy can do a certain job in 6 hours. Kris can do the same job in 8 hours. If Tammy and Kris work together to complete the same job, how many hours will it take for them to complete it?

Calculus - Approximation
Use linear approximation, i.e. the tangent line, to approximate cubed root { 1.1 }. The equation of the tangent line to f(x) at x = 1 can be written in the form y = mx+b. Show your work. Do not use a calculator.

Math - Calculus 1
Approximate using derivatives. (Must show work using derivatives!) Do not use a calculator: (1.1)^4 - (1.1)^2

Calculus - Related Rates
Suppose that you are watching a spaceship take off. You are 100 meters from the launch pad, and you measure the angle made by the rocket and the ground to be increasing at a rate of (d)(theta)/dt = 0.1 radians per second. What is the velocity of the rocket when theta = pi/4?

Physics
usain bolt set the world record for the 100m dash, proving to be the fastest man in history, with a time of 9.58s. what was bolt's average speed in miles per hour? (his initial speed was 100m/9.58s I got 23.35 mph for this I need help with this. VVVVVVVVVVVVVV assume that ...

math
Joe is playing a game with a regular die. if the number that turns up is even he will gain 5 times the number that comes up. if it is odd, he will lose 10 times the number that comes up. he tosses a 3. express the results as an integer

College math
A bag contains 9 white 7yellow marbles,8 green marbles. If one marble is drawn from the bag then replaced, what is the probability of drawing a white marble then a green marble?

Help with compute probability
Compute the probability of randomly drawing five cards from a deck and getting 3 Aces and 2 Kings. (Give your answer as a fraction.) Probability

Chemistry
So I've done as you said and have come up with the following: C (g) = 0.0437g H (g) = 0.00583g O (g) = 0.01167g C(mol)=0.00364mol H(mol)=0.00578mol O(mol)=0.000729 I then divide for the ratio (Mm=m/n) and get 12 for C, 1 for H, and 16 for O, making the formula: C12HO16, ...

Chemistry
Sorry, it's 0.06120 g produced 0.1601 g of CO2 and 0.05243 g of H2O

Chemistry
Hey, can someone help me with this? A compound containing only C, H and O was subjected to combustion analysis. A sample of 6.120Ã—10^-2 g produced 1.601Ã—10^-1 g of CO2 and 5.243Ã—10^-2 g of H2O. Determine the empirical formula of the ...

Precalculus
Thank you so much!!! I see what I was doing wrong now. PS: You have good handwriting :)

Precalculus
Yeah, I tried drawing a diagram, but I just keep getting confused.

Precalculus
In triangle ABC, we have AB=3 and AC=4. Side BC and the median from A to BC have the same length. What is BC? Please help, I have no idea where to start.

math
a man sleeps 8 hours a day. how many hours can he sleep in a year?

math
Sara is thinking of a number when she rounds her number to the nearest hundred,she gets 700.What is the greatest number Sara can be thinking of?Explain

Physics
A drag racer starts her car from rest and accelerates at 4.8 m/s 2 for the entire distance of 409 m. How long did it take the car to travel this distance?

Science
Which of the following means using specific observations to make generalizations? A: BIAS B: Subjective C: Deductive Reasoning D: Inductive resoning is the answer c?

Social Studies
yes he is correct 5 is c

home economics
what are the branches of fibre

Physics
A block of mass m1= 3.70kg rests on a 30degree incline and is held stationary by a mass of 1.3kg hanging vertically over a frictionaless pulley at the top. Calculate the value of u (coefficent of friction)

Physics
56.7 m

Math
How do you write 4,000,000,000 + 20,000,000 + 500,000 + 60,000 + 1,000 + 300 + 40

Chemistry
24.332

math
6 people like soccer, 3 like volleyball, 7 likefootball, and 2 likebasket ball show that in tallies

Economics
Consider a single price monopoly that faces a market demand curve for a good is given by the equation 𝑃=100−.1𝑄 and the total cost function is given as 𝑇𝐶=1000+20𝑄+.4𝑄2. a. What is the total fixed cost for this monopoly? P=...

Social Studies
Thank you Anonymous

Social Studies
Everyone needs to chill 1. If Ms.Sue is gay so what, If you don't like it go somewhere else and get the answer 2. Ms.Sue is a human if she got it wrong, OK y'all never made a mistake? Should we be mean to you for your mistake? Shes only human y'all can have a ...

science
The boy A weighs 50 kg and the girl B weighs 35 kg in a seesaw...the board of the seesaw is 3.6 meter... To balance the seesaw where should girl C who weighs 25 kg seat or what particular distance should girl C seat to balance it

Calc
Find the value of m such that y=mx divides the area under the curve y=(1-x)x in [0,1] into two regions of equal area D: D: D:

Math
Solve the equation: (1) 5/2 = 3x; x= (2) 7/2 = 4x; x=

Math
Solve the equation: (1) 5= 6y; y (2) 7/2 = 4x; x

Math
Solve the equation: 9/5 = 1 + m; m

Math
Solve the equation 1) 4= 5y; y = 2) 7/4 = 1 + m; m= 3) 7= 6y; y

Maths
Prove that sin2x+cos2x-1/sin2x+cos2x+1=tanx

Math
A fossilized leaf contains 21% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14.

Science (Biology)
krfkrfrf

Math
A car is traveling at a rate of 35 meters per second. What is the car's rate in kilometers per hour? How many kilometers will the car travel in 3 hours? Do not round your answers.

Math
solve these questions using distributive property 30% Of 10= 30% of 20= 30% of 30=

Calc
a large closed storage rectangular box with a base constructed with two different types of wood. the base is made up of wood \$5 per square feet and the top and sides are made of wood \$3 per square feet suppose the amount available to spend is \$1000 find the dimensions of the ...

math
The angles of elevation of a balloon directly above a straight road, from two points of the ground on opposite sides of the balloon, are 78¡ã15' and 59¡ã47'. If the points are 5000ft apart, what is the height of the balloon?

ENGLISH
A creative writing teacher tells students to publish their writing projects in a nonprint format. Which of the following techniques would not meet the teacher’s requirements?

Chemistry
14 grams of coal undergoes complete combustion in 58 grams of oxygen gas. What volume of gas (measured at 25 degrees celsius and 100 kPa) is present when the reaction is complete?

Calculus
Launching a missile to hit a target 100 miles away. Determine the launch speed of the missile along with the angle at which it's to be fired. Also, show your work and one of the angle that will work. Finally, assume that the only force acting on the missile is gravity.

Maths
The sum of the interior angles o a regular polygon is 30 right angles. How many sides have the polygon?

University of Liberia Chemistry 102
Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

Math
If the 16th term of an arithmetic sequence is three times the fourth term, find the ratio of the 23rd term to the third term.

physics
7.500N

physics
calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

Calculus
A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

Calculus- Reiny
Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

Calculus- Reiny
Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

Calculus
A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

math
Would it be: (-1, 14) and (6,7)?

math
I'm still pretty lost.. :/

math
what are the solutions to the system? y=x^2 - 6x+7 y=-x+13

Chemistry
A Chemist wanted to determine the percentage of calcium carbonate in a sea shell. He collected a number of sea shells which he crushed into a fine powder. To 2.65 grams of sea shell powder he added 25.0mL of 5.0M Hydrochloric acid. When all the fizzing ceased, he filtered the ...

math/algebra
thank you so much. I thought so.

math/algebra
The surface area of a rectangular prism is SA=2lw+2wh+2lh. The volume of a rectangular prism is V=lwh. Write an expression for the ration of surface area to volume.

chemistry
Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. When 75.0 mL of the NaIO3 solution have been added, what is the concentration of the Cr(III) ion remaining in solution? not sure how ...

chemistry
The Kb of ammonia is 1.8 x 10–5. What is the percent ionization of a solution of ammonia, 0.50 mol L–1 NH3, that contains 0.020 mol L–1 of ammonium nitrate, NH4NO3? when i use the ICE table i don't end up with an unknown so im not sure what to...

chemistry
thank you! :)

chemistry
At equilibrium, a solution of formic acid at 25°C has a pH of 2.18. The pKa of formic acid, HCOOH, is 3.74. Which of the following is the initial concentration of the solution? Not sure what to do my thoughts: use henderson hasselback equation pH = pKa + log [conj ...

statistics
the amount of pyridoxine in grams per multiple vitamin is normally distributed with mean = 110 grams and standard deviation = 25 grams. What is the probability that a randomly selected vitamin will contain between 100 and 110 grams of pyridoxine?

algebra
y varies inversely with x, and y = 10 when x = 2. What is the equation for the inverse variation?

Chemistry
When the ratio of neutron-to-proton dictates that a neutron must break down it will form a helium nucleus an alpha particle a proton and an electron*** Two protons

Chemistry
Which of the following materials is necessary to stop gamma radiation one foot of concrete single sheet of paper thin pieces of wood three inches of lead***

Math
vvvvvvvvvvvvvb

Calc
Find the number b such that the line y = b divides the region bounded by the curves y = 4x2 and y = 16 into two regions with equal area. (Round your answer to two decimal places.)

math or algebra
F2088nd the next three terms of the sequence. -2, -12, -72, 432. Possibilities are: 1. -1728 -6912 -27,648 2. -1728 -10,368 -62,208 3. -2592 -10,368 -41,472 4. -2,592 -15,552 -93,312 I have tried multiplying positive numbers times the negative but can't make the numbers ...

MATH HELP !!!!!
I know a fraction is the answer but can't make it work for the probability question asking for what is the chance you will pull a pink eraser out of a,container that has 5 green .2 striped.4 pink.and 3 white.?

Math

Math

Math
Square is 20 feet wide and 21 feet long what is the disdence from one corner to the other

Science
Thanks lilly

physics
Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

physics
Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

algebra
a student measures the height of a sign to be 2 meters. the shadow of the sign 3 meters. the student notices that at the same time nearby tree has a shadow of 15.6 meters. how tall is the tree? What equation would be used for this?

Chemistry
Calculate the ph of a solution that is 0.157m HCI?

LA
Anonymous is right thanks

Math
Two telephone poles are 60ft. apart, and one of them is 6ft. higher than the other. If the length of the wire between the poles is 61.3 ft., how much wire was allowed for sag?.

Life orientation
zuma's career! I hope this helped you on you're homework!

Math
To do this, you have to factor the radicand (or the number inside the radical sign) and look for perfect squares. For instance, 2 * √(48) 2 * √(16*3) 2 * √(4*4*3) Express the repeating factors using exponents, so it's easier to see. Since four is ...

Life Orientation
The 'disappearances' of detainees in the custody of Russian federal forces in Chechnya is a major human rights crisis that the Russian government and the international community must address." "While combat between federal forces and Chechen rebels has for ...

I hope this helps! √≈1.7320508075688772

ELA
Maybe, don't frown mr brown

ELA
My little brown trout

L.o

math
Create sketches by hand of the following sine functions, showing at least one full period and state the domain and range. Submit them to your teacher using the drop box above. It may be easiest for you to scan your hand drawn sketches and submit the scan file. Part A: ...

statistics
the marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. Given that the pass mark is 20, estimate the number of students who passed the examination.

PROB
What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

Math, NEEDS HELP EMEDIETLY!
the sample size is 144

Post a New Question