# Posts by Mike

Total # Posts: 3,799

**Chem**

So i wrote a net ionic equation, and I believe is wrong. Fe(ClO4)3. I wrote 3H+(aq) + Fe(OH)3(s) = Fe3(aq)+ + 3H2O (l) Had to come up with the acid and base that would form the compound

**Calculus**

Find dy/dx for y=3tan^-1(x/2). I know the answer is 6/x^2+4 but I'm stuck at y'=3(1/1+(x/2)^2)(1/2)

**Physics**

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

**Physics**

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

**ER Diagram - Database **

An online retailer, S record, which sells physical music albums, plans to implement a DBMS to enhance its data management practice and ultimately advance business operations. The requirements collection and analysis phase of the database design process has provided the ...

**Math**

Solve for 0 < ? ? ? sin ? = sin 2? I get (0,?/3,?,5?/3). Idk what I did wrong.

**math**

sally and hans started counting at the same time. sally counted on by tens from 300. hans counted back by hundreds. after six counts they had reached the same number. what number did hans start counting from?

**physical science**

two cars are headed straight for each other, each at a constant speed of 40mph. A. do the two cars have the same speed? b. do the two cars have the same velocity? c. what is the acceleration of each car while moving at a constant speed

**Math-college**

So it doesn't matter the order? Thanks Sue

**Math-college**

6*4*3*2=144 Would that be the answer, 144 combination choices?

**Math-college**

Tim is making is making a sandwich he has 3 choices of bread, 2 choices of lettuce, 4 choices of meat, and 6 spreads to choose from. How many combinations is he able to make?

**algebra-math**

A club with 25 members wishes to select a 4-member leadership team. How many ways can this be done? 25x4=100 100 variations in the leadership team Would this be correct by any chance?

**algebra-math**

Amy is packing her bags for her trip that she won to go on a boat cruise. Amy won 4 tickets to the boat cruise and Amy can only bring 3 people along with her on this trip, but 15 of her friends want to go. How many different types of groups of friends can Amy bring with her? ...

**Math-college**

Here is my problem. I bought my son Tommy, his back to school clothes. I can’t tell you how happy he is too being going back. Tommy now has, 7 Shirts: 7 Pants: 3 pairs of shoes: How many different possible outfits can Tommy make? Answer would be, 7x7x3=147 147 possible ...

**algebra-math**

When it comes to linear inequalities, these are explained to be similar to a linear equation, but the difference between the two is that the equal signs are replaced with an inequality symbol. It is also explained that when it comes to doing a linear inequality, it is more ...

**algebra-math**

I can adapt PsyDag's or Ms Sue preference. Would like to compare. Cause, I can't say I have a preference.

**algebra-math**

What is your preference?

**algebra-math**

Make a preferred method of solving a system of linear equations and why. Which method do you prefer? Do you think that matrices make the process easier? Or do you prefer not to use matrices? Once again thank you for any help given on this.

**algebra-math**

Create a system of linear equations. Explain the steps for solving a system of linear inequalities. Make a system of linear inequalities problem. Please help me with this?

**algebra-math**

exponential equation Solve for x 10^1^-x=10^4

**algebra**

Compound interest word problem. Suppose JJ has $1000 that he invests in an account that pays 3.5% interest compounded quarterly. How much money does JJ have at the end of 5 years? Formula: A= The amount of money earned after a certain length of time. P= The amount of money you...

**algebra**

Compound word problem Sarah decides to open up her own bank account for her schooling and wants to save money. She decides to put $500.00 in the savings account she is opening. The amount she earns has 8% interest and it’s compounded quarterly. How much would Sarah have ...

**algebra**

Logarithmic equation Solve for x: 3x=15

**algebra**

Solving exponential and logarithmic equation. An example of an exponential equation is: Solve for x: 5^x=125

**Math-college**

Create a compound interest word problem. Be sure to include the following, leaving one of the variables unknown: The amount of money earned after a certain length of time, A. The amount of money you start with, the principal, P. The interest rate, r. The amount of time over ...

**Math**

Please show work on how to solve.

**Math**

Create an exponential or logarithmic equation.

**Marh**

If 5000 is the total how do you figure an amount plus 6% to get the total of 5000

**Math-college**

(x + 3)(x -4) < 7, Why is this incorrect statement? I know the reason this is incorrect is because you cannot set each part equal to 7. Is there a more detailed reason? Thank you for the help.

**Math-college**

Find an? nth-degree polynomial function with real coefficients satisfying the given conditions. n=4; i and 3 i are zero; f(-2)=65 f(x)= An expression using x as the variable. Simplify your? answer.

**Math-college**

Can you please help with this one. Find an? nth-degree polynomial function with real coefficients satisfying the given conditions. n=4 2 i and 4 i are zeros; f(-1)=85 f(x)= ?(Type an expression using x as the variable. Simplify your? answer.)

**Math-college**

Explanation of why the following statement is incorrect. (x + 3)(x -4) < 7, and explain why it is incorrect. To solve (x + 3)(x -4) < 7, start by setting (x + 3) = 7 and (x - 4) = 7. Now solve the inequality. Provide a detailed explanation of why using this method to ...

**Math**

Explanation of how to find the asymptotes of the graph of a rational function.

**Math**

Hoping Henry can help on previous prob. A ball is thrown upwards from a roof top, 80ft above the ground. It will reach a maximum vertical height and then fall back to the ground. The height of the ball from the ground at time T is H, which is given by H= -16t2 + 64t +80. V = ...

**Quadratic Equation - Henry**

Hoping Henry can help on previous prob. A ball is thrown upwards from a roof top, 80ft above the ground. It will reach a maximum vertical height and then fall back to the ground. The height of the ball from the ground at time T is H, which is given by H= -16t2 + 64t +80. V = ...

**slope-intercept equation **

Write the? slope-intercept equation of the function f whose graph satisfies the given conditions. The graph of f is perpendicular to the line whose equation is 2x-5y-10=0 and has the same? y-intercept as this line. The equation of the function is?

**One-to-one function**

Explanation of why functions must be one-to-one functions to have an inverse?

**Quadratic Equation**

A ball is thrown upwards from a roof top, 80m above the ground. It will reach a maximum vertical height and then fall back to the ground. The height of the ball from the ground at time T is H, which is given by H= -16t2 + 64t +80

**Quadratic equation**

A theater is selling kids tickets for $2 each. The adult tickets are $5 each. The total sold is $500. How many kids tickets are sold if $50 in adult tickets are sold?

**College linear word equation**

Joe receives a base salary of $42,000 annually and a commission of 10% of the total sales he makes for the year. If Joe sales are $800,000 of goods. What is his total salary for the year?

**Bps science**

This is a physical change. All changes of state are physical changes.

**Calculus**

Find the limit x->pi/2^+ tan(x) I know the answer is -?, but I don't understand why. When I simplify to sin(x)/cos(x), I get 1/0^+.

**physics**

the floor of a lorry is 3m high, a plank 5m long is used as an inclined plan to raise some leading the maximum effort required to raise 200N load up the plane

**physics**

the floor of a lorry is 3m high, a plank 5m longis used as an inclined plan to raise some leading the maximum effort required to raise 200N load up the plane

**geometry **

A 4?-ft vertical post casts a 20?-in shadow at the same time a nearby cell phone tower casts a 115?-ft shadow. How tall is the cell phone? tower?

**Biology**

1) How can fishing cause expression changes and how can these changes be associated with changes at DNA level? 2) How do changes in gene expression hell fjsh adapt to different selective pressure? (I have a presentation about this, so it would be very useful if you linked some...

**Biology**

1) How can fishing cause expression changes and how can these changes be associated with changes at DNA level? 2) How do changes in gene expression hell fjsh adapt to different selective pressure? (I have a presentation about this, so it would be very useful if you linked some...

**calculus **

priya decides to go to the store which is 8km from her house. she first ran at a rate of 7km/h then walked the rest of the trip at a speed of 3km/h. if the total trip took 2hrs how many kilometers did she walk?

**Calculus**

Find the limit. lim 1/x^2-4 a)x->2^+ b)x->2^- c)x->-2^+ d)x->-2^- I'm completely lost. I don't understand how some answers are infinity and the others are negative infinity.

**Math**

A canadian television station shows 16 mins of commercials every hour between 8am and 11pm everyday. How many minutes of commercials are there on the station between 8 am and 11 pm in 365 days?

**MATH**

Calculate the area of the composite figure which is not drawn to scale. 17 cm 10 cm 22 cm 17 cm 19 cm the shape is a rectangle with a right triangle on its side

**Calculus**

At what point is the function y=csc(2x) continuous?

**Calculus**

If lim x->4 f(x)-5/x-2 =1, find lim x->4 f(x). I know the answer is 7, I need help on solving it. Thanks

**Math**

If you pay $950000 for a car and its value depreciates 10% per year how much will be its worth 5 years from now?

**Algebra**

A businessman has $1000 income from bonds bearing 4% and 5%. If the amounts invested at 4% and 5% were interchanged, he would earn $50 more annually. Find the total amount invested by the businessman.

**Human Relations**

inflection best relates to

**Math**

ABC is a triangle in which B=90 if AB=6 BC=8 then calculate the length of the third side of the triangle

**Physic**

If the energy used to heat up a block of 2kg of copper is 115.8 kJ, what is the temperature it was heated to if the starting temperature was 100oC and the specific heat capacity is 386 J/kgK.

**phy**

1. A small fly wheel fitted to a motor with a moment of inertia of 80 kg m² slows down from 9000 rpm to 5500 rpm in 7.5 seconds. For the fly wheel, calculate: • The rate of deceleration which you can assume to be constant • The braking torque. 2.If the energy ...

**Please solve this riddle**

What always ends with a S, and always has a C in the middle, but if you never use it then it would start with an A.

**Algebraic word problem**

Three friends Alex, Ben, and Casey presented a young mathematician with a puzzle. They told him that the sum of their ages add up to 98 years. Double Alex’s age and add to Ben’s gives 84 years. The sum of three times Alex’s age and twice Casey’s age is 163...

**Math**

How do you make this problem true 4+3x5-1=22

**Calculus**

Let R be the first quadrant region enclosed by y=e^2, y=e^x and the y-axis. The area of region R is? I don't understand why is the interval is from [0-2]. Thanks

**Calculus**

The velocity of an object is given by v(t)=t(t^2-1)^(1/3) feet per second. Find the total number of feet traveled by the object in the time interval [0,3] seconds. I understand how to solve the problem, but I do not understand why is the interval now from [0-1] [1-3], and not ...

**Physics**

A magnetic field is uniform in a region of radius 10cm, and increasing at 0.02 Tesla/second. What is the magnitude of electric field in the region outside the magnetic field at radius of 15 cm?

**Calculus**

The position of a particle moving along the x-axis as a function of time,t, is given by x(t)=(1/6)t^3-t^2+3t-1 for t?0. The particle's velocity becomes three times its initial velocity when t=? I know v(t)=x'(t)=(1/2)t^2-2t+3=9, but I do not understand where does the 9...

**Math**

A ship is sailing due north. At a certain point the bearing of a lighthouse is N 40?E and the distance is 15.5. After a while, the captain notices that the bearing of the lighthouse is now S 54.9?E. How far did the ship travel between the two observations of the lighthouse.

**math**

A triangle has a base of 11 inches and a height of 8 inches. What is the area of the triangle?

**Chemistry 2**

Silicon carbide, SiC, is prepared by hearing silicon dioxide in the presence of graphite. Carbon dioxide is the by-product of the reaction. How many grams of silicon carbide can be formed from the reaction of 50.0 grams of graphite with 50.0 grams of silicone dioxide? Here is ...

**Chemistry 2 **

A scientist studying the reaction between decaborane (B10H18) and oxygen mixed 1.00 x 10^2 grams fo oxygen. Compute the masses of all substances present after the reaction went to completion, generating B2O3 and water as the only products.

**Math**

Mary is riding a merry-go-round, whose radius is 25 feet and which is turning 36 degrees per second. Seeing a friend in the crowd, she steps off the the outer edge of the merry-go-round and suddenly finds it necessary to run? At how many miles per hour does she have to run?

**Englsih**

I guess yo have already figured that mapping is the right answer. Though, you also contact the writers from the professional service if you are in trouble because of your essay. Check out please Prime writing service

**English Writing**

There are lots of online material available for you. And if you have a strong desire, you may actually learn anything. Coming back to your sentences, I was worrying to stay in the English class. However, she turned it comfortable and fun to make me visit every class.

**English**

Is it going to be your college paper? or any other type of your assignment? I want to tell you that you ma either google about it or write that by yourself and turn to the writers from Marvelous essay service to proofread it. At the end, I am sure you will get the high grade ...

**English composition**

Well, no matter of its is your task or not you are here to get the help. And I find it ok to ask for the help if you feel unsure about your work. I actually advise you to go to the professional service as Marvelous essay service and order there your paper

**Science **

Which of earth's spheres contains mountains,valley's, and other landscapes?

**english**

I like your topic and I think that I had to write a paper on the similar topic a week ago. Good that that I found the service where the writers assisted me with that. You may also go that way and ask the writers from Marvelous essay service to help you

**government**

write acrostic poem on federalism

**Math**

A colony of bees doubles in population every 5 weeks.hpw long does it take for the population to triple ?

**Physics**

bobpursley did you intentionally square the radius values for the second volume, instead of making it to the power of 3? " volumecharge=4/3 pi ((.438^2)-(.146)^2) "

**math**

There are 30 students in the class. There are 4 more boys than girls in the class. What do I do to solve this? The ratio is 4:1? Then what do with the 30? I am very confused.

**Business math**

An invoice is dated January 25 with terms 2/10 -20x. Find the final discount date and the net payment date. The net payment date is 20 days after the final discount date.

**Math**

Dad bought an octagonal gazebo package. Does he cut the cedar planks first on the floor at 60 and 120 degree angles for this octagon shape?

**Wood shop**

Convert a 3ft. X 8ft. Piece of plywood to a 2ft. X 12ft. Price with one cut

**Math**

The number 0f blocks has 9 in the one's place the number in the hundres place is one more than the number in the tens place those two numbers equal 11 how many blocks are there

**4th grade math**

its either 45 or 75 right??....helping my son, and we cannot figure this out, simply because i dont understand the Sum of my Digits is 12 bit....helllllppppp!!!!

**History**

The United States in 1846 was not justified in going to war with Mexico. The United States did not have proper justification to respond with violence against the Mexican government. The war with Mexico was also a product of the United States’ belief of manifest destiny. ...

**physics**

Force=Eq=sigma/epsilion * e what does the lower case 'e' stand for, in the above equation?

**Algebra 7th grade**

Thank you so much.

**Algebra 7th grade**

I need help putting this problem into slope intercept form please. (3,4) m=2 Thank you.

**Algebra 7th grade**

I need help putting this problem into slope intercept form please. (3,4)m=2 Thank you.

**Pharm Math**

Which of the following does not cause sedation Prazosin Buspirone Alprazolam Sucralfate

**Calculus**

f'(x)=sqrt(x)*sin(x) The first derivative of the function f is given above. If f(0)=0, at which value of x does the function f attain it's minimum value on the closed interval [0,10]? I know the answer is 6.28, but I need steps as to why. Please and thank you.

**math**

In a recent, a single person could expect to pay $3400 in income taxes on an adjusted gross income of $34000. How much more tax should the person expect to pay if her adjusted gross income increased by $4000, knowing that this would not move her into the higher tax bracket

**Chem 111**

A cylindrical tank measuring 6.00 feet in diameter and 17 feet, 6 inches, in length is filled with room temperature water. How many kilograms and pounds does the water weight? The density of room temperature water is 1.00 g/mL.

**Maths**

Thanks Damon but please do not waste any more of your time proving your superior intelligence. It is not becoming. You have simply not managed to grasp the situation. I am an old man bordering dementure and have no comprehension whatsoever of what you are on about. All I ever ...

**Maths**

Hello Damon, Thank you. The answer obtained is now much more in line but I have just realised having logged on again that you are helping me calculate the length along the arc and what I posted for is to solve the triangle. ie Find the length in a straight line. Please re read...

**Maths**

Hello Damon, Thank you but you have grossly over estimated my capabilities. I have done all you suggested and the first result furnished a ridiculous number with an e in it. The second site I tried was only interested in calculating my BMI. I did get a result from another site...

**Maths**

I posted yesterday but feel I confused the issue with an incorrect calculation of an angle, I have just realised my mistake!. I also think I should come clean about my circumstances. I am a mature (very) student, in fact a retired commercial fisherman and am studying celestial...

**Maths**

Thanks again Reiny, Thanks very much for confirming my calculation is correct although I am sitting here chuckling to myself about the way your answer is expressed. I would still love to solve the triangle if anyone will just do the calculation for me PLEASE! Thanks Mike