Answer:
Step-by-step explanation:
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.
(b) To have no winner within the first 6 tosses means that there must be 3 tails and 3 heads tossed. So we count how many ways can that happen. The number of ways to choose 3 heads (or tails, doesn't matter) from 6 tosses is

so 20 ways winthin the 6 tosses. but the question was "how many ways among the 128 of 7 tosses" so we need to add the 7th toss by multiplying by another 2 possibilities for the outcome of the 7th toss, giving us the answer: among the 128 there are 40 games that are tied and need the 7th toss.
(c) The probability is the number of tied games (after 6 tosses) divided by the total number of possible configurations among 6 tosses:

Answer:
60.8 inches
Step-by-step explanation:
The relevant equation (formula) here is i(t) = (7.6 in/hr)t, where t represents time in hours.
i(8) represents the distance the snail crawls in 8 hours and is
i(8) = (7.6 in/hr)(8 hrs) = 60.8 inches
Answer:
2-x would be 5, 5-3=2
3-x would be 6, 6-3=3
4-x would be 7, 7-3=4
5-x would be 8, 8-3=5
6-x would be 9, 9-3=6
Step-by-step explanation: