# Posts by Natalie

Total # Posts: 667

math
16

Math
Jamie spenta total of \$11.60 on 5dentical pens and a ruler .A rulercost\$1.30less than a pen .how much did a pen cost?

chemistry
1) A Galvanic cell runs on the following reaction: Co (s) + Cu2+ (aq) ? Co2+ (aq) + Cu (s) Draw a diagram for this Galvanic cell, labeling the electron flow, the anode and cathode, and the positive and negative sides of the Galvanic cell. 2) A Galvanic cell runs on the ...

math
vol of wood= 3*20*120=7200cm3 density of wood= M/V=8000/7200=1.111g/cm3 density of water=1030/1000cm3=1.03g/cm3 so no the wood will not float as it has more density then water

Thanks, I changed the second answer to B and got them both right. :)

Anyone mind checking these 2 quiz answers please? Which statement best explains why nation-states write constitutions? A: Constitutions give citizens unlimited powers. B: Constitutions establish nation-states. C: Constitutions allow governments to elect leaders D: ...

Math
On Aug 14th, One of our Partner's ( Compuville ) cash book showed a debit balance of \$4,000.00. His bank statement showed a balance of \$4,270.00. On comparison the following were found: * check issued amounting to \$2,500.00 has not been cashed * The bank rejected checks ...

math
Nilsa converted 1/12 to a repaeting decimal and wrote 0.083 as her answer what error did she make

Calculus
Thank you so much! ^^

Calculus
Hi, could you help me with this one please? Evaluate ∫sin(x)cos^2(x)dx by using the substitution u=sinx Ive done this by using u=cosx no problem but can't get this one :( Thank you so much in advance!

fedreal government
Which of the following statements about the Articles of Confederation is UNTRUE? a. It was the second official constitution used to govern America b. It was the first official constitution used to govern America c. Power was too decentralized d. It established a loose league ...

the variable point P(x, y) moves so that it is the same distance from the points (1,6) and (3, 2). The equation of the locus of P may be obtained by?

math
a room measures 22 feet by 28 feet. They are covering the floor with square tiles that measure 1 foot on a side and cost ​\$0.89 each. How much will they spend on the​ tile?

Math
4x^2(2x^3 – 5x +6)

Math
a regular plot of land is designed so that its length is 6 meters more than its width. the diagonal of the land is 10 meters. to the nearest tenth of a meter, what are the dimensions of the land?

Math
Marissa bought 2 1/4 gallons of orange juice to make punch. How many qts of oj did she buy? Marissa bought 6 fewer pints of soda than oj. How many cups of soda did she buy?

College Algebra (pt.3)
I did indeed. Thank you again for helping me out! Have a great night!

College Algebra (pt.3)
Alright, this is a bonus question on my homework. I think I did it wrong... How long will it take for an investment of \$1000 to grow to \$1750 if interest is compounded continuously at a rate of 8%? Round to the nearest tenth. A=Pe^rt \$1750=\$1083.38 divided ans= 1.62

College Algebra (pt.2)
Thank you again for your help! I thought it was seeming a little too easy for me to be doing it correctly.

College Algebra (pt.2)
Hey, I would love if someone could please look over my answers. I just learned this yesterday and want to make sure I did my hw correct. Thanks!!! Solve for x. Round answers to four decimal places where appropriate: 6. ln(5x-3)=0 ans= x=3/5 7. log5^x=3 ans= x^3=5 8. log2^32=x ...

College Algebra
Steve! Thank you so much! I was way off! I'll be practicing more.

College Algebra
Hey, I would love if someone could please look over my answers. I just learned this yesterday and want to make sure I did my hw correct. Thanks!!! Solve for x. Round answers to four decimal places where appropriate: 1. 6^x=6^2x-1 Ans.= x=1 2. 3^x=1/27 Ans.= x=-9 3. e^3x=10 Ans...

science
Sure! No problem👻

science
True, but I think the answer that makes the most sense is "create a family safety plan". Even though the storm would be over, this could still be helpful. It's always best to consult your family before making independent desicion a that may compromise your safety...

science
It's hard to say, because a few of these answers could potentially be correct. It depends on what your teacher has been teaching you during class, but I think that the most logical answer is "create a family safety plan".

Math
Two transparencies, both 8.5 inches by 11 inches, were folded and taped to make cylinders. Prove mathematically, that they have the same volumes

College Algebra/pre-calculus
The Pointless Pencil Company purchases a new stamping machine for the production line that cost \$8000. The equipment will be replaced in 10 years at which time its salvage value is expected to be \$1000. Write a linear equation giving the value, y, of the machine during the ...

Math
What are 2 ways to arrange 300 chairs so that there are the same number of chairs in each row?

Math
A farmer wants to construct a pen with 100 feet of fencing. The pen will be divided into two areas as shown below. Find the maximum dimensions of the big pen. All I have so far is that 3x+2y=100. I am not sure how to move forward.

algebra 1
does 4x+5y=0 represent a direct variation? if so, find the constant of variation. complete the steps to solve 4x+5y=0 for y.

physics
What potential difference is required to reduce the initial speed of the proton by a factor of 2? A proton has an initial speed of 3.1×105 m/s .

Math
Sarah made a square tablecloth and wants to put lace around the edges. The length of one side of the tablecloth is 56 inches. How much lace will Sarah need?

algebra 1
a bout travels 280 miles downstream and back. The trip downstream took seven hours. The trip back took 14 hours. The speed of the boat in still water and the speed of the current

science help
I think "c" is the best answer :)

Physics
google search the first part of the equations i have it up with the picture

Physics
A woman holds a 1.90-m-long uniform 5.0-kg pole as shown in (Figure 1) ( its horizontal). A. Determine the force she must exert on the pole at A. Express your answer to two significant figures and include the appropriate units. Enter positive value if the force is upward and ...

English
Its not d

English
Thank you

English
In the sentence "There comes a time when the cup of endurance runs over, and men are no longer willing to be plunged into an abyss of injustice," the bolded phrase creates a mood of __________ among the audience A.Panic B.Despair C.Anger D.Anticipation

Math
A.625-465=\$160 he has to pay for 2 days=160 \$ rent paid for 1 day=260/2=\$80 amount paid for 5days=8*5=\$400 But he paid \$465 Difference 465-400=\$65 so every one has to pay \$65+rent for the no. of days total rent for x days y=65+80 x (dollars) B. f(x)=65+80 x

Math
Is |5|and |-5|equal? Its really hard to figure out.

chemistry
If 6.30 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction?

Applying Rational Number Operations
Do u think that is going to help Ruby no offense I just really need help

Applying Rational Number Operations

Applying Rational Number Operations

chemistry
Thanks

chemistry
Write potassium sulphate +barium nitrate ¨ potassium nitrate + barium sulphate as a balanced symbol equation

math help needed!
Estimate the instantaneous rate of change of the function f(x) = x ln x at x = 1 and at x = 3. (Use h = 0.1, 0.01, 0.001, 0.0001, and so on. Round your answers to four decimal places.)

math
Find the derivative algebraically. g(t) = t^2 + t at t = −1 I can't seem to start this problem correctly. What is the process required for this question?

This is what I have done so far for part a: I plugged in h = 0.01 got f'(1) = 1.004983416 h= 0.001, which equals 1.0049 h = 0.0001, and got 1.000049998 h = 0.00001 and got 1.000005 h 0.000001 and got 0. I tried putting in 1.0049, 1.0050, and 0.0000 in but none of those ...

Estimate the instantaneous rate of change of the function f(x) = x ln x at x = 1 and at x = 3. (Use h = 0.1, 0.01, 0.001, 0.0001, and so on. Round your answers to four decimal places.) f '(1) = f '(3) = What do these values suggest about the concavity of ...

Nevermind, I got it! I just needed to zoom out more on my graph.

I got zero for part a by plugging the function into a calculator but I still do not get part b.

Assuming that limits as x → ∞ have the properties for limits as x → c, use algebraic manipulations to evaluate lim x → ∞ for the function. a. f(x) = x − 2/2 + 6x^2 b. f(x) = x^2 + 6/x + 7 Please help! I do not know how to start with this ...

math/physics
Wait nevermind! I got it! Thank you so much!

math/physics
How do you find the vertex? Do you just put it into a graphing calculator?

math/physics
A pomegranate is thrown from ground level straight up into the air at time t = 0 with velocity 96 feet per second. Its height at time t seconds is f(t) = −16t2 + 96t. a) Find the time it hits the ground. t=? s b) Find the time it reaches its highest point. t=?s c) What ...

math
Thank you so much! I missed the negative part about the term which definitely impacted the answer.

math
Determine the end behavior of the function as x → +∞ and as x → −∞. f(x) = 1000 − 39x + 51x^2 − 10x^3 As x → +∞, f(x) → ???? . As x → −∞, f(x) → ??? I know that the end behavior of the function...

Thank you so much! That helped a lot!

The depth d of water in a tank oscillates sinusoidally once every 4 hours. If the smallest depth is 7.9 feet and the largest depth is 10.1 feet, find a possible formula for the depth in terms of time t in hours. (Let the water depth be at the average when t = 0.) I got y=1....

math
thank you!!!! I did mess up the period. I didn't think about it that way. Thank you so much!

math
The desert temperature, H, oscillates daily between 36°F at 4 am and 56°F at 4 pm. Write a possible formula for H in terms of t, measured in hours from 4 am. I thought the answer is -10cos(1/6pi times t) +46 but it got marked wrong. I thought that the amplitude is 10 ...

Thank you so much!! That really helped!

For a boat to float in a tidal bay, the water must be at least 2.7 meters deep. The depth of the water around the boat, d(t), in meters, where t is measured in hours since midnight, is d(t) = 5 + 4.6 sin(0.5t). (a) What is the period of the tides in hours? (Round your answer ...

Math
A banquet hall has 22 tables for 4 and 15 tables for 6 ,but 3 chairs are missing from the tables .How many many chairs will there be if 134 are seated

math
If you have to find f(t)g(t) where f(x) = 2/x and g(x) = 4x+2 I got 2/t times 4t+2 and then from that I got 8t+4/t. How do I simplify that further?

math
Just kidding! I got it!

math
Find f(g(x)) where f(x) = 2/x and g(x) = 4x+2 I got till 2/(4x+2) but am not sure where to go from there. Please help!

math
For the data I gave above, we need to find a formula for the exponential function. I got b to be 605. That part is right at least, right? Because of how 605 = b times a^0 which means b equals 605. (0 because the 605 matches up with sea level in the data--I posted it weirdly) ...

math
How did you get the 0.0000917? I plugged log(1.096) divided by 1000 and got 3.98 times 10 to the -5.

math
For example, when I try to solve an equation like 1.096 = a^1000, what should I do? I'm trying to find a formula for this set of data and that's how I got the above equation: d=??? Elevation (ft) Sea level labeled h 1000 2000 3000 4000 Takeoff roll (ft) labeled d 605 ...

math
Thank you! I forgot that you could divide the two!

math
Given an exponential graph that are concave up and the points (1,4) and (-1, 16), give a possible formula of the function. I plugged the variables into the f(x)=b times a^x and got: 4= b times a^1 and 16=b times a^-1 I am not sure where to go from here.

math
Thank you so much for all of your help!

math
A town has a population of 2000 people at time t = 0. In each of the following cases, write a formula for the population, P, of the town as a function of year t. (a) The population increases by 60 people per year. I thought it would be P= 2000 (1.03)^t (b) The population ...

Math
Wow, you're a genius! Thank you so much, that worked! I didn't even think about involving the quadratic equation! Thank you again!

Math
For better clarification, the first part to this problem had (0,2) instead of (0,b) and the answer came out to be (-2,4). I kind of guess and checked for that question.

Math
Consider the functions in the figure below. Find the coordinates of C in terms of b. So there are two functions. There is the y=x^2 u-shape and then a line in the middle of it with points (0,b) and (1,1) in that order from left to right. Farther to the left of point (0,b) is ...

math
Thank you so much! That worked!

math
I posted this question yesterday and I was told I was correct but for some reason the online hw website will not take it.

math
For tax purposes, you may have to report the value of your assets, such as cars or refrigerators. The value you report drops with time. "Straight-line depreciation" assumes that the value is a linear function of time. If a \$1020 refrigerator depreciates completely in...

math
Thank you so much! That really helps. I totally forgot that the range would have to be over 9 due to the plus 9 in the equation.

math
Find the domain and range for y=x^2+9. Is the answer all real numbers? How would you enter that in interval notation? From Googling the definition of real numbers, I now understand that the infinity sign would not be included. For a continuous function you use closed brackets...

Math (functions)
Thank you!

Math (functions)
For tax purposes, you may have to report the value of your assets, such as cars or refrigerators. The value you report drops with time. "Straight-line depreciation" assumes that the value is a linear function of time. If a \$1020 refrigerator depreciates completely in...

chemistry
Arrange the following aqueous solutions in order of decreasing freezing points (lowest to highest temperature): 0.10 m Na3PO4, 0.35 m NaCl, 0.20 m MgCl, 0.15 m C6H12O6 and 0.15 m CH3COOH.

Physics
M1 = 45.0 kg is a spherical mass at the origin. M2 = 16.6 kg is also a spherical mass, and is located on the x-axis at x = 78.0 m. At what value of x would a third mass M3 = 15.5 kg experience no net gravitational force due to M1 and M2?

PHYSICS
Can you please make a solution for this problem so i could understand it better...

PHYSICS
A and B run around a circular track whose cicumference is 150m. when they run is opposite directions they meet every 5 seconds, but when they run in the same direction from the some point they are together every 25 seconds. what are their rates? ans. 18m/s and 12m/s can you ...

science
how physical/mechanical and chemical weathering different?

science
how are they different?

science
can someone help me?

science
how are physical/mechanical and chemical weathering alike?

UGH THIS PROBLEM IS KILLING ME!!!!!!!!!

Last year, the Widget Corporation had \$650,000 in sales. This year, sales are down 4%. How much did the Widget Corporation sell this year?

math
thank you so much!

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