the rectangle on birthday the perimeter of 24 cm and the width of 4 cm find the length of the rectangle and calculate the area of the triangle pqr

  16 cm^2

Step-by-step explanation:

The sum of length and width is half the perimeter, so is 12 cm. Since the width is 4 cm, the length is 12 cm -4 cm = 8 cm.

The area of the rectangle is the product of length and width, so is ...

  rectangle area = (8 cm)(4 cm) = 32 cm^2

The area of the triangle is half the area of the rectangle, so is 16 cm^2.

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct

6.9

step-by-step explanation:

simple math really

6 1/2 times 0.6 = 3.9

but if you are just doing 6 and not 6 1/2 then the answer is 3.6