Answer:
Option A. 10 years
Step-by-step explanation:
we know that
Half-life 
is the amount of time required for a quantity to fall to half its value as measured at the beginning of the time period.
In this problem of a radioactive isotope is 10 years, which means that after 10 years half of the sample would have decayed and half would be left as it is.
After 10 years ( first half life) 5/2 = 2.5 g decays and 2.5 g remains left
Answer:
Luke has 13 marbles
Step-by-step explanation:
t = number of marbles Tom has
l = number of marbles Luke has
t = 2l
t+l = 39
Substitute t = 2l into the second equation
2l + l = 39
Combine like terms
3l = 39
Divide by 3
3l /3 = 39/3
l = 13
Luke has 13 marbles
Tom has 2 * 13 = 26 marbles
(0+4) = 1(5-0)
point slope form
Answer: 64units³
Step-by-step explanation:
The volume of a cube will be gotten by multiplying the value of its side thrice. This means that for example if the cube has a side of xcm, the volume will be:
= x × x × x
= x³
In this case, since the cube has a side of 4 units, the volume will be:
Volume of cube = 4³
Volume of cube = 4 × 4 × 4 = 64unit³
