Answer:
400×W+50×A=?
Step-by-step explanation:
since it's 400 a week then you need to take into account the weeks worked. Then since it's 50 per an appliance you need to multiply by the number sold.
28 hours and 5 min
86
are of trapezoid =1/2×height(a+b)
A=1/2×8(10+20)
=4×30
=120cm*