<span>1. Natural numbers are also known as "counting numbers", and are whole numbers starting at 1. A simple example set is {1, 2, 3, 4, 5}. The reciprocal of a number is 1 divided by that number. The reciprocal of 2 is 1/2; this is not a natural number.
2. The set of whole numbers includes natural numbers and zero. A simple example set is {0, 1, 2, 3, 4}. The opposite of 1 is -1; this is not a whole number.
3. The set of integers include whole numbers and their negative counterparts. A simple example set is {-2, -1, 0, 1, 2}. The reciprocal of 1 is 1, which is an integer.</span>
Answer:
7892 dolphins
Step-by-step explanation:
let P denote the dolphin population.
-Notice this is an exponential decay and is denoted as:
![P_t=P_oe^{-rt}](https://tex.z-dn.net/?f=P_t%3DP_oe%5E%7B-rt%7D)
Where;
is the population at time t- t is the time
- r is the rate of decay or decrease in population
is the initial population size.
#Given t=30yrs,
=20000 and r=3.1%, the population after 30 years is estimated as:
![P_t=P_oe^{-rt}\\\\=20000e^{-0.031\times 30}\\\\=7891.07\approx7892\ dolphins](https://tex.z-dn.net/?f=P_t%3DP_oe%5E%7B-rt%7D%5C%5C%5C%5C%3D20000e%5E%7B-0.031%5Ctimes%2030%7D%5C%5C%5C%5C%3D7891.07%5Capprox7892%5C%20dolphins)
Hence, the dolphin population after 30yrs is approximately 7892
Answer:
156
Step-by-step explanation:
While solving we will have to use the area formula of the rectangle, which is :A=w*l ; length*width=A.
Steps:
1)let’s consider that the shape is a full rectangle. => 16*12=192.
2)9*2=18 -> 18*2=36
3)192-36=156.
Answer:
42: 1,2,3,6,7,14,21,and 42
GCF of 42 & 15: 3
GCF of 42 & 50: 2
Step-by-step explanation:
have a day