Pls ! : ) the population of a certain animal species you are studying decreases at a rate of 3.5% per year. only 80 of the animals in the habitat remain after 3 years of conducting your research. what was the initial amount of animals? pls use the formla pe^-rt

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )