The half-life of radium is 1690 years. If 50 grams are present now, how much will be
present in 80 years?

50*10 is greater

step-by-step explanation:

if you add the zero from 10 to 50, it will give you a bigger number.

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3

me! what did you put for this question?

step-by-step explanation:

the line of