Answer:
B)
Step-by-step explanation:
Answer:
Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz.
(Human infants can actually hear frequencies slightly higher than 20 kHz, but lose some high-frequency sensitivity as they mature; the upper limit in average adults is often closer to 15–17 kHz.)
Answer:
-12b+6c+18
= -12(2) +6(-3) + 18
...-24-18+18
therefore...the answer is -24
Answer:
x=18
Step-by-step explanation:
x2+4=40
-4 -4
x2=36
/2 /2
x=18
