A. A design is remodeled after analysis and tested again.
Answer:
He was an American statesman, politician, legal scholar. military commander, lawyer, banker and economist.
Answer:
PB is a substance composed of Phosphorus and Boron; Pb is the symbol for the metal Lead, Pb came from the Latin “Plumbium”.
(Just like Na (Sodium) came from Natrium, K for Potassium came from Kalium, et cetera).
Explanation: