The answer is 14 centuries (b.)
Because x+y = z like a+b= c
Take the square root of both sides to solve and you get a= 0.4,-0.4
Answer:
Step-by-step explanation:
To calculate percentages, start by writing the number you want to turn into a percentage over the total value so you end up with a fraction. Then, turn the fraction into a decimal by dividing the top number by the bottom number. Finally, multiply the decimal by 100 to find the percentage.
Hope this helps!