Answer:
$233.95
Step-by-step explanation:
299 x 0.7 = 209.30
209.30 x 1.07 = 233.95
Answer:
±5
±25
Step-by-step explanation:
we can use formula

where
fL is listener frequency
fs is siren frequency
va is the speed of sound in air
vs is police car speed
so, we have



now, we can change it into m/s


now, we can plug it

..............Answer
Step-by-step explanation:

Answer:
FGHE
Step-by-step explanation:
They have the same angles size