P = 2L + 2W
Find the value of P if L=7.9 cm and W=12.4 cm. Round to the nearest TENTH
Just sustitute in and do the math.....
P = 2(7.9) + 2(12.4) and round to tenth...
15.8 + 24.8
40.6 cm
+5 
+37158 
