To create an entry? code, you must first choose 2 letters and? then, 3 ? single-digit numbers. how many different entry codes can you? create? the answer is not 676,000

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

: )

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm