Please answer ASAP. Thank You.

Step-by-step explanation:

So we have the inequality:

This means that our solution is all numbers less than or equal to -4. Therefore, in interval notation, this is:

This represents all the numbers from negative infinity up until -4. This is equivalent to the inequality.

(-∞, -4]

Step-by-step explanation:

This means all values less than -4 and including -4

It goes from -∞  up to and includes -4

Parentheses for -∞  brackets for -4 since we include it

(-∞, -4]

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

: )