Answer:
8 times
Step-by-step explanation:
Find how many times she has to practice by dividing 6 by 3/4:
6 / (3/4)
= 8
So, Cathy will have to practice 8 times.
10 grams Vanadium will be left after 48 days
Further explanation:
Half-life is the time after which the chemical is reduced to half.
The reaming mass after half life is given by:

The formula for calculating the remaining mass after given time period is:

Here n is the number of half lives passed
Now,
Given
Mass=80 grams
Time= 48 days
Half-life = 16 days
The number of half lives will be:

Putting the values of n and mass in the formula

10 grams Vanadium will be left after 48 days
Keywords: Half-life, radioactive
Learn more about half-life calculation at:
#LearnwithBrainly
Need photo of the segment.
Answer:
2 5 8
Step-by-step explanation:
2+5+8=15
im not sure if that's what its asking for. if it isn't im sorry