ElectricPavlov

B.   First, ya have to find the value of 'x'

       there are 360^o in a circle

          in this circle, there is 90^o + 45^o + 3x + 2x = 360^o        So x = 45^o    and 2x = 90 degrees

            90 degrees is a fraction of 360^o      90/360

              Total area of circle = pi * r² 

                  so the shaded area is   90/360 * pi * (8²) =~ 50.26 in²

A   Perimeter of ENTIRE circle (360^o )    from point A to point B is only 45 degrees...or  a fraction of 360  :  45/360

      formula for ENTIRE perimeter of a circle is pi * diameter

          so distance is   45/360  *  (pi * diameter)    = 45/360 (pi) ( 1200) =~ 471 ft

(4x+5)^2

" A perfect square is a quadratic expression that factors into two identical binomials. Therefore, the quadratic expression x2 + 4x + 4 is a perfect square since it factors into two identical binomials which are (x+ 2) and (x+ 2). "

From WolframAlpha:      1-i

Just use g(x) = 2x+30 and f(x) = sin x

Gather the like terms together....be aware the - sign reverses the +- of the terms in the parentheses

3x^2+2x^2  +4x-4x  -8-2

5x^2 - 10

3000 e^0.1t  =  1000000   Solve for   t = 58.09 years

Judging from the high of 400, her day 21 appears to be approx 300

  if she put in 100  then the next five days she added a total of 200 more to reach 300

    200/5   =  $40 / day

See other post...duplicate

89 and 23 by looking at list of primes.

89+23