20 points

a particle that makes up the basic unit of an element is called an animal atom entity organism

Step-by-step explanation:

1.) atom ; tissue

2.) cell

3.) organ system

4.) true

5.) atom

6.) Particle

hope this help

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step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft