# Posts by MIKE

Total # Posts: 3,752

**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

**Maths**

Had a think about the angles I described as being a touch less than 90 degrees. I have determined (I think) they are 89 and 119 over 120 degrees each Mike

**Maths**

Thanks also to Steve but I am sorry I am still no wiser! Mike

**Maths**

Thanks bobpursley and Reiny I really appreciate the time you have obviously put into this on my behalf but I am sorry I am a very long way from understanding your explanations. In fact what I am trying to achieve is to determine how far I would have to travel from Earth in ...

**Maths**

Please could someone help or complete an unusual calculation for me. I need to solve a triangle where all the angles are known and 2 of the sides. 2 of the sides are identical and 2 of the angles are identical. One angle is one sixtieth of one degree. The other 2 angles are ...

**Algebra 2**

PLEASE SHOW WORK FOR ALL PROBLEMS, I WANT TO UNDERSTAND HOW TO DO IT, NOT JUST THE FINAL ANSWER :) 1. find all the zeros of the equation -3x^4+27x^2+1200=0 2. Use the Binomial Theorem to expand the binomial (d-4b)^3 3. What is the equation of y=x^3 with the given ...

**viscosity**

Liquid has a specific gravity of 9.54, What is the centipoise value?

**Calculus**

If the functions f and g are defined for all real numbers and f is an antiderivative of g, which of the following statements is NOT necessarily true. (A)If g(x)>0 for all x, then f is increasing (B)If g(a)=0, then f(x) has a horizontal tangent at x=a (C)If f(x)=0 for all x...

**Math**

1_4x_3=2_5

**trigonomitry**

a ship is spotted in a distance it is 10 nautical miles directly east and is traveling directly north at 5 knots . your ship is currently facing east and given the current winds can travel at 6+(.01}b knots. What angle should your ship turn to catch up to the other boat

**Algebra 2**

For each function, identify the horizontal translation of the parent function, f(x)=x^2. Then graph the function. 19. y=(x-4)^2 I need to figure out how to solve this problem, so steps would be appreciative! PLEASE don't leave websites for me to check out, I guarantee you ...

**AP Bio**

When pure-breeding red cows are bred with pure breeding white cows, the offspring are roan. The roan cows also have a gene for horn vs. hornless cattle. The allele for horns dominates the allele for hornless. If a bull and cow are heterozygous for both genes, what are the ...

**Math**

-8y = 2x -7 +9y +7= 2x Determine whether each equation represents a direct variation. If it does, find the constant of variation.

**healthcare stats**

$15200

**Calculus**

f'(x)=sqrt(x)*sin(x) The first derivative of the f is given above. If f(0)=0, at what value of x does the function f attain its minimum value on the closed interval [0,10]?

**Finance**

Contributing $1,500 to his retirement fund at the end of each year beginning at age 18 through age 50, with an average annual return of 12%, how much does Juan have in his retirement account at this time to use toward a possible early retirement?

**Math**

Anne, Ryan and Joel collect empty cans. They collect a total of 1925 cans. Anne collects half as many as Ryan. Joel collects twice as many cans as Ryan. How many cans does Joel collect? Use bar model to solve.

**Algebra**

Bailey has 21 yards of embroidery floss to make friendship bracelets. if each bracelet requires 2 1/3 yards, how many bracelets can she make?

**American Gov.**

Which of the following does the free exercise clause of the first amendment protect? a. Teacher-led prayers in schools b. attending church c. the establishment of a state religion d. nurses reading the Bible to patients in a public hospital. My answer is B. Is this correct? If...

**American Gov.**

I meant to write "C" as my answer, sorry!

**American Gov.**

In holt vs hobbs what did the supreme court use as a basis for its decision? a. Holt was not a member of a recognized religion. b. the government was preventing Holt from practicing his religion. c. The prison had a compelling interest in facilitating prisoner identification ...

**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. (A)51/4 (B)34/3 (C)45/4 (D)51/8 (E)45/8

**American Gov.**

in the case of schenck vs united states justice oliver wendell holmes jr wrote: "the most stringent protection of free speech would not protect a man in falsely shouting fire in a theatre and causing a panic." this is an example of what kind of rights? a. absolute ...

**Math**

All of those numbers are squared btw, sorry.

**Math**

It will not let me send the links but here's the data of the Triangles Figure A: Leg a= 9 units (length) Leg b= 36 units (bottom) Leg c= 64 units (diagonal length) Figure B: Leg a= 25 units (length) Leg b= 144 units (bottom) Leg c= 169 units (diagonal length) I'm not ...

**Math**

Which of the images above represent a proof of the Pythagorean Theorem? Explain your choice, and then explain how the figure proves the Pythagorean Theorem. Images are in the comments >links<

**physics**

13.1

**Calculus**

Starting at t=0, a particle moves along the x-axis so that its position at time t is given by x(t)=t^4-5t^2+2t. What are all values of t for which the particle is moving to the left? (A)0<t<0.913 (B)0.203<t<1.470 (C)0.414<t<0.913 (D)0.414<t<2.000 (E)...

**Calculus**

The function f is given by f(x)=3x^2+1. What is the average value of f over the closed interval [1,3]? The answer I get is 12, but the book says it's 14. I don't understand why.

**Calculus**

Let f be a function with second derivative given by f''(x)=sin(2x)-cos(4x). How many points of inflection does the graph of f have on the interval [0,10]? (A)Six (B)Seven (C)Eight (D)Ten (E)Thirteen

**Science**

is a an airplane flies with a constant speed of 500 miles per hour how long will it take to travel a distance of 500 miles

**Calculus**

The function f is continuous on the open interval (-π, π). If f(x)=cos(x)-1/xsin(x) for x≠0, what is the value of f(0)?

**Calculus**

Let f be a differentiable function defined on the closed interval [a,b] and let c be a point in the open interval (a,b) such that I.f'(c)=0 II.f'(x)>0 when a≤x<c III.f'(x)<0 when c<x<≤b Which of the following statements must be true? (A)f...

**Calculus**

If the functions f and g are defined for all real numbers and f is an antiderative of g, which of the following statements is NOT necessarily true? (A)If g(x)>0 for all x, then f is increasing (B)If g(a)=0, then f(x) has a horizontal tangent at x=a (C)If f(x)=0 for all x, ...

**Statistics**

A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined nicotine content...

**Sience**

One bottle of shampoo costs $6 for 8oz. A second bottle costs $4 for 5oz. Which has the lower unit rate?

**Physics urgent pleasw**

Stone is thrown vertically downward with an inital speed of 2.0m/s from height of 10m, determine time it takes to reach the bottom. Thanks!

**Math**

Let r(t) be a differentiable function that is positive and increasing. The rate of increase of r^3 is equal to 12 times the rate of increase of r when r(t)=?

**Math**

Just because you said that, I picked a building and I got 100%, thank you so much.

**Math**

The SI unit of measure for length-the meter-would be most appropriate when a. Measuring the wingspan of an insect b. measuring the height of a building. c. measuring the length of an ant. measuring the distance between two cities

**math**

Ben deposits $400 into an account that earns 5% interest compounded annually. Sam deposits the same amount into an account that earns 5% simple interest. Compare the account balances after 2 years.

**Chemistry**

Which of the following has no effect on the rate ofa reaction? a)degree of branching or size of reactant molecules b)value of Heat of reaction c)presence of a catalyst d)temperature of the reactants e) concentrations of the reactants