Answer:
21
Step-by-step explanation:
Volume= (4/3)*pi*r^3
40007= (4/3)*pi*r^3
r=21m
The half-life of the radioactive substance is 67.95 hours.
Answer:
243
Step-by-step explanation:
Given that:
Day 1 = 3
Day 2 = 9
After the 2nd day, number of cells continue to triple ;
Day 3 = 9^3
P(t) = 9 * 3^3
P(t) = 9 * 27
= 243
Answer:
(9,36)
Step-by-step explanation:
Substitute the 4x for the y in second equation.
Basically setting them equal to each other because the both have 'y='
4x = 8x - 36
-4x = -36 (subtract 8x from both sides)
x = 9 (divide by -4, both sides)
y = 4(9) (Substitute the x value into first equation)
y = 36