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Mathematics
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Oct 11th, 2014

QA) SA= n(1/2*b*L)+B

n- #of sides -4

l- length of side -13

b- length of base -14

B- area of base - (4)(14) -56

SA= 4(1/2 * 14 *13) + 56

     = 4(7 * 13) + 56

     = 4(91) + 56

     = 364 + 56

SA = 420 cm - does not need to be rounded.

QB) SA = WH+LW+LP+LS

         =(19)(12.8)+(17)(19)+(17)(17)+(17)(15)

         = 243.2 + 323 + 289 + 255

   SA = 1,110.2 in - rounded to 1,110

QC) SA =(Pi-3.1412..)rl + B

r-radius -4

l- length -10.8

B- area of the circle -Pi(r) squared - Pi(4) squared- 16Pi

    SA =Pi(4)(10.8) + 16Pi

          =43.2Pi +16Pi

    SA =59.2Pi in -round to 59Pi



Oct 11th, 2014

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Oct 11th, 2014
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