Mathematics

Can somebody help with math........EXPLAIN please

8^2 + 11 (1 point) 2.(-2)^4(1 point) 3.5 + (3^2 – 2)^2(1 point) Write each number in scientific notation or standard form. 4.30,500,000(1 point) 305 × 105 30.5 × 106 3.05 × 107 0.305 × 108 5.2.01 ×

Complete each statement with < or > 24. m < 1 greater or less than m < 5? Help?!

I need help with question 24 and 25, I am really confused. Here is the link to the picture: http://www.flickr.com/photos/53367954@N0…-1.) > The measurement of angle 1 looks obtuse and the measurement

Can one of you geniuses help me with this Maths question

The question is: Rearange this formula to make r the subject. u + v = uvf Thank you!-Since r is right above f on the keyboard, I think you meant u + v = uvr If so then r = (u+v)/(uv)-r does not occur

Need Help With Math Homework (Word Problems)

I know its my homework put i have alot to do an i need help! Ex 1.) A 23ft cable is cut into two pieces, one three times as long as the other. how long are the pieces? Ex 2.)If seven times a certain

Is there an easy way to remember the special 8 trig. identities

In my AP Pre-Calc 2 class, we were given a list of trig identities to memorize. i.e. (secx)(cosx) = 1 tan^2x = (secx) + 1 and so on, is there any easy way for me to remember them?-Not knowing what

Math homework help it due tomorrow

I need help on my homework and tomorrow is Terry Fox day so if we dont finish it we have to do it we have to do in the study hall and i want to go to the dance.Heres the question:black71 +3 blank4 +bl

How to solve rate of work math problems

It would take Tom 10 hours to paint the fence around his backyard by himself. After Tom has been painting for 2 hours, Jerry comes to help him and together they finish painting the fence in 3 more hou

How to determine sample size to find mean

I forget my statistics... The problem is that the variable is not binomial, it is within an assumed range (i.e. it is along the interval 0 to 25) in a pretty much infinite population. How should I sel

Trig derivatives? f(x)=7arcsin(x^2)

If f(x)= 7arcsin(x^2) what is the derivative? f(x) please help-derivative of arcsin(u) = u/sqrt(1-u^2) here u = x^2. [7 arcsin(x^2)] = 7*[arcsin(x^2)] = 7*[2x/(sqrt(1-(x^2)^2))] = 14x/(sqrt(1-x^4)).

Statistics Question Need help asap

2 events A and B are mutually exclusive. P(A)=.3 P(B)=.4 What is the probablility that event A does not occur and event B does not occur which is P(A(complement) and B(complement).-Hi, P(A) = .7 and

Im having trouble with this algebra problem

its a like terms problem so its 7b-b-x+5-2x-7b and tell me some tips if you have some-First combine all the bs and then combine all the xs.7-1-7=-1 and 1-2=-1.So you have -b and -x and 5.So the simpl

Help please with this integral cosx√(1+sin²x)

∫ cos(x) √(1 + sin²x) dx u = sinx du = cosx dx ∫ √(1 + u²) du Use trig substitution: u = tanθ du = sec²θ dθ ∫ √(1 + tan²θ) sec²θ dθ= ∫ √(sec²θ) sec²θ dθ= ∫ secθ sec²θ dθ Use integration by parts:

I am thinking of a number....

I multiply it by 6 and add 66. I get the same answer if I multiply by 10 and subtract 10. What is my number? (Please show me your working out)-You need to make an equation. 10n-10=6n+66float and pingn

Maths - factorising the quadratic.

Im wondering how i would go about solving this... 2x^2+9x+4 Please can you go through the steps?-Im guessing you want the roots: (2x+1)(x+4) = 0 2x + 1 = 0 x = -0.50 x + 4 = 0 x = -4-Obviously you

Can someone confirm these answers please? (Speedy!)

3^-2 = 0.111111111........ 3.2^-4 = 9.536743164 (-03) Thanks in advance (I expected some more normal numbers to be the answers as we are not meant to use calculators on this bit!)-3^(-2) = 1 / 3^2 =