ElectricPavlov

Now if you graph the function you will find that guest1 got the correct answers for where the function EQUALS zero.   The graph will show you that for 1  < = x  <= -5/2   the value will be GREATER than or EQUAL to  ZERO

Not sure I know what 'Algebra Tiles' are ...but:

-4x + 8 = -8

Subtract 8 from both sides

-4x = -16    Divide both sides by -4

x = 4

Do you mean:     y = 15 , 418  e ^(-0.929x)    ???         you'll need more info to calculate 'y' or 'x'     

Use Pythag theo to get length     8.3^2  + L^2 = 43.6^2      L= 42.8

Sq Ft of wall =   8.3 x 42.8 = 355.26

Each can covers 21.5 sq ft

355.26/21.5 =   16.524 cans ~  17 cans 

Nitrous oxide is N2O   Molecular weight is 14(2) + 16  = 44 gm/mole

STP = Standard Temp and Pressure     0 degrees C   and one atm pressure

One mole of gas occupies 22.4 liters of space at STP

1kg of N2O   is   1000/44 moles  =   22.727 moles

22.727 moles x 22.4 l / mole =  509 liters          A cubic meter is 1000 liters      509/1000= .509 m^3   for 1 kg N20 @ STP     (about a half of a cubic meter)

You'll have to be given the numbers the pie sections represent       and the total pie number       

then   pi r^2 = area        each section then will be   (pie section number)/(total pie  number)  x pi r^2

10'12" = 11'

11' (12 in/ft)  x 23"  = 3036 in^2  

3036/144 = 21.0833 ft^2

Take the ln of both sides

ln26.6 = .1722t+  ln18.5

(ln26.6 -ln18.5 ) / .1722  = t   = 2.1088

At 45 degrees both legs of the triangle are equal, i.e.  the distance FROM the building and the HEIGHT of the building are EQUAL.  (T)

At 30 degrees then   Tan(30) = T/(400+T)

.57735 = T/(400+T)    Solve for T

T= 546.40 ft tall