Answer:
Step-by-step explanation:
I would say (C.) because the scientist only looked for the presence for both not just nickel or just lead.
Hope that helps.......if wrong I apologize.
2^x =20
take log() for both sides
xlog(2) = log(20)
x= log(20)/log(2)
x= 4.322
Multiply the first fraction by two and the second by twenty five on both top and bottom.
16/50 + 25/50 = 41/50
Each month with 31 days have a consumption of 58125 gallons
