During an epidemic, the number of people who have never had the disease and who are not immune (they are susceptible) decreases exponentially according to the function f(x) = 15000e-^(0.05t) , where t is time in days. find the number of susceptible people at each time below.
at the beginning of the epidemic
after 14 days
after 21 days
after 5 weeks

Solving this problem is just pretty straight forward. All we simply have to do is to plug in the value of t (in days) in the function, solve then we get the number of susceptible people.

A. At the beginning of the epidemic
t = 0

f(x) = 15000 e-^(0.05 * 0)

f(x) = 15000

B. After 14 days

t= 14

f(x) = 15000 e-^(0.05 * 14)

f(x) = 7,448.78 = 7,449

C. After 21 days

t = 21

f(x) = 15000 e-^(0.05 * 21)

f(x) = 5,249

D. After 5 weeks

t = 5 * 7 = 35

f(x) = 15000 e-^(0.05 * 35)

f(x) = 2,606.61 = 2607

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.