Answer:
im thinking the answer is B. 3
Step-by-step explanation:
It has to be the last one, D. I did it over 3 times to make sure.
Answer:
its probably 6×2=12 times
coin has 2 sides
dice has 6 faces
scientist A dissolved 1 kg of salt in 3 litres.
scientist B dissolved 20 pounds of slat in 7 pint of water.
we know that 1 pound =0.543 g
20 pounds=9.07 kg.
1 pint=0.5 litres
so 7 pints =3.5 litres
so dissoving 1 kg of salt in 3 litres of water and 9.07 kg in 3.5 litres of water
we know that for concentration kg/l units is used .
for A= 1/3=0.33kg/l
and B=9.07/3.5=2.59 kg/l.
so scientist A has prepared more concentrated solution .
72/8 +3*4 - 105 /5
= 9 + 12 - 21
= 21 -21
= 0
