The scores on an exam are normally distributed, with a mean of 84 and a standard deviation of 6. what percent of the scores are less than 90?

Please show all of the work. I have limited time to get this answer.

Analyze the function f(x) = - tan 4x. Include: - Domain and range - Period - Two Vertical Asymptotes

HI HELP ME PLEASE AND SHOW WORK AND AN EXPLANATION

05/21/14

Algebra 1 question below in description

A rectangular window is framed by two rectangular shutters. The window is twice as tall as it is wide. The shutters are as tall as the window, and their widths are 24 cm less than their heights.... more

05/21/14

8x+5y-4 and 4x-3y-9

I need the answer to this it's not for school just for a project problem

05/21/14

It costs$1500 each week to make bookbags plus a marginal cost of $10 per calculator. Find the break even point for the bookbags if the bookbags are sold for $40

It costs$1500 each week to make bookbags plus a marginal cost of $10 per calculator. Find the break even point for the bookbags if the bookbags are sold for $40 a piece.

05/21/14

A gardner can sell 350 carrots at $2.00 each or 370 at $1.50 each. Find the linear monthly demand function for the carrots.

A gardner can sell 350 carrots at $2.00 each or 370 at $1.50 each. Find the linear monthly demand function for the carrots.    

How do you find focus, directrix and axis of symmetry?

I have a test on chapter 9 in Algebra 2 tomorrow and I don't understand how to find the focus, directrix, and axis of symmetry of a equation. For example:   -5+1/3y2=0

05/20/14

y=|x-1|+2 find domain and range

The domain is all real numbers, Is there a number line for this?

05/19/14

Find the inverse function

Find the inverse function of g(x)= (√x+8)/(3-√x) g-1(x)=

05/19/14

Need to turn these numbers to degrees

french horn= 6trumpet= 15tube= 8trombone=11The band director in the previous problem decided that displaying the information in a circle graph would help him determine if his students were evenly... more

05/19/14

Find a solution for theta in radians

Using the inverse trigonometric function keys on your calculator, find a solution for theta in radians tan (θ-3)-0.12 when θ=

02/07/14

What is 4x+3y Simplified?

I am doing Algebra 1 and I was wondering what x+x-3+4^2+2x-x is simplified, also, 20+3xy-3+4y^2+10-2y^2 is simplified. Thank You.

x^3+x^2-4x-4

solve using factor method

The marginal cost of a product can be thought of as the cost of producing one additional unit of output. For example, if the marginal cost of producing the ...

The Marginal cost of a product can be thought of as the cost of producing one additional unit of  output. For example, if the marginal cost of producing  the 50th product is $6.20, it cost $6.20 to... more

11/25/13

Algbrea 2 Math

Whats the GCF of the following   5x^8+10x^7-15x^6+10^5   Factor the expression   5x^8+10x^7-15x^6+10^5=      

Solve 5=2.1L1-2L210=4.4L2-2L1

The number after L is under the L and smaller.I need to get them to 0.

11/05/13

solve: 2/3y-5+6y-49=$126

If 2 people raised $126, how much did the other 3 raise?    What I have tried so far: 2/3y-5+6y-49=$126   2/3y+6y-5-49=$126   6 2/3y-(-54)=$126   ....now stuck    

11/01/13

Is this a polynomial and whats the term, variable, and degree if its a polynomial.

2x+1/2x=    Is this a polynomial and whats the term, variable, and degree if its a polynomial. 

10/22/13

Given that x =tan 1/2 y,prove the following:

Given that x =tan 1 y , prove that dy =       2                              2                      dx       1 + x2

Theapproximated by h(t)=-15t²+60t+10,0=t=10. Find the times when the Tee-shirt will reach a fan 55feet above ground level.

The height h(t), in feet, of an airborne tee-shirt t seconds after being launched can be approximated by h(t)= -15t^2+60t+10,0<t<(the symbol < has a line under it)10.  Find the times when... more

10/20/13

How many liters of water should be added to 8 liters of a 75% antifreeze solution to make a 40% antifreeze solution?

How many liters of water should be added to 8 liters of a 75% antifreeze solution to make a 40% antifreeze solution?

10/20/13

in triangle abc AB=AC , angle bisectors of angle B AND C intersect AC atE and AB at F respectively . prove that BF=FE=EC

in triangle abc AB=AC , angle bisectors of angle B AND C intersect AC atE and AB at F respectively . prove that BF=FE=EC  

10/17/13

Word problem

the top of a shoebox has an area of 84 sq. inches.  The volume of te shoebox is 546 cubic inches.   How tall is the shoebox?

10/17/13

what is half of 2/3?

in order to get half of 2/3 do I divide by 2 or 1/2? in general when I want to find the half of something do I divide by 2 or 1/2? Why? (I am getting confused)

10/17/13

-7p -1 + 8p inequality 8

-7p-1+8p inequality 8  

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