Exponential decay formula is :
Where a≠0, b≠1 , b represent growth or decay factor (or rate) and x is any real number.
But if a radioactive isotope decays in half every year which means the decay factor or decay rate is 50% or 
.
So, the formula for half decay will be:
Where represent c) The rate of isotope decreases.
Answer:
John and Pam are paid $8.5 for each hour worked. John's share of the money is $29.75.
Step-by-step explanation:
Let x = the hourly salary. John worked for 3.5 hrs, and Pam for two. We can represent this using the equation:
3.5x + 2x = 46.75, where the coefficients equals the amount of hours.
Let's solve for x!
5.5x=46.75
x = 46.75/5.5 = 17/2 = 8.5
John and Pam are paid 8.5 dollars per each hour worked.
To figure out John's share of the money, we will multiply the wage by the hours he worked.
8.5 x 3.5 = 29.75
4 out of 5 went to potential members, so 1/5 of the total went to existing members.
(1/5)·215 = 43 . . . . went to existing members
Distance² = (difference in 'y')² + (difference in 'x')²
= (0 - 7)² + (4 + 4)²
= 49 + 64
= 113
Distance = √113 = approx. 10.63 (rounded)
Answer:
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Step-by-step explanation:
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