Answer: 3
Step-by-step explanation:
Move the decimal back to its point of origin
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
Answer:
C
Step-by-step explanation:
The formula for finding the distance between 2 points (x1, y1) and (x2, y2) is
d = √[(x2 - x1)² + (y2 - y1)²]
Here (x2, y2) = (2, 3) and (x1, y1) = (4, -3)
Plugging them gives us
d = √[(2 - 4)² + (3 - (-3))²]
d = √[(2 - 4)² + (3 + 3)²]
Answer:
- 56
Step-by-step explanation:
Given a quadratic equation in standard form
ax² + bx + c = 0 ( a ≠ 0 )
Then the discriminant Δ = b² - 4ac
Given
3 - 4x = - 6x² ( add 6x² to both sides )
6x² - 4x + 3 = 0 ← in standard form
with a = 6, b = - 4 and c = 3, thus
b² - 4ac
= (- 4)² - (4 × 6 × 3) = 16 - 72 = - 56
Answer: Option (4) is correct.
Step-by-step explanation:
Given that,
B = {John, Paul, George, Ringo, Pete, Stuart}
Now, we have select the Set that is equal to the Set B.
From all the options given in the question, option (4) is correct.
It contains all the elements of Set B but only the arrangement or sequence of the Set is different.
Correct Set 4 = {Paul, Ringo, Pete, John, George, Stuart} = Set B