Answer:
B is only equilateral, everything else is correct.
Step-by-step explanation:
The answer is 645.88 y because you have to multiply them together in order to get your answer.
Synthetic fibers are made from raw materials such as petroleum, based on chemicals or petrochemicals [20]. These materials are polymerized into a long, linear chemical with different chemical compounds and are used to produce various types of fibers.
Average price=total price/total weight, let p be the average price:
p=(3*4+5*4*(100-20)/100)/8
p=(12+16)/8
p=$3.50/lb
