Answer:
D
Step-by-step explanation:
a^-b = 1/a^b
Using this formula...
10^-3 = 1/10^3
So this expression is basically saying...
1/1000 or 0.001
Answer:
After 80 years 432 pounds of radioactive element will be remaining.
Step-by-step explanation:
A function
models the amount of a radioactive material.
Here x = number of years taken for decay.
If
pound and
pound, then we have to calculate the time for decay.


Take log on both the sides of the equation

-0.0077x = ln(0.54)
-0.0077x = -0.616186
x = 
x = 80.02 years
Therefore, After 80 years 432 pounds of radioactive element will be remaining.
Answer:
$120
Step-by-step explanation:
Since after $20 coupon, the price become $100, then before it was
(20 + 100) = $120
Thenks and mark me brainliest :)
2.34 im pretty sure. Hope it helps!