Take 49 and divide it by 7 and you get 7. 7 times 10 is 70. Your answer is $70.
Answer: Mrs.Buller collects a 500-ml sample of seawater for her chemistry class, and it has 1.94% of chlorine, we have to determine the amount of chlorine in the sample:

Therefore the chlorine content in 500ml of water is 9.7ml.
Is the algebra, if so what type?