The maclaurin series expansion for cosx iscosx=1−x2/2+x4/4! −x6/6! +x8/8! +⋯starting with the simplest version, cosx, add terms one at a time to estimate cos(pi/4). after each new term is added, compute the true and approximate percent relative errors. use your calculator to find the true value. add terms until the absolute value of the approximate error estimate falls below an error criterion conforming to two significant figures.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system

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step-by-step explanation:

im not sure what this means: mc011-7.jpg

step-by-step explanation: