Answer:
<em>The loudness of the dinner conversation is 40 dB</em>
<em></em>
Step-by-step explanation:
Loudness in dB = 10
where 
is the least intense sound a human can hear = 
W/m^2
For a dinner conversation with sound intensity of 
= 
W/m^2
Loudness = 10 
= 10 
= <em>40 dB</em>
The Point-slope form of a line is:
y-y1=m(x-x1), where m=slope and (x1,y1) equals any point on the line.
In this case we are given that m=-12 and a point (5,3) so:
y-3=-12(x-5)
To start the day, Jeff had $46.18
he gave half to his brother so
46.18/2 = 23.09
he has $23.09 left
he bought two donuts for $0.75 each
2 * 0.75 = $1.50
23.09 - 1.50 = 21.59
he now has $21.59
now he bought a coffee for $2.99
21.59-2.99= 18.60
Jeff has $18.60 left
Answer: 20.833mph.
Step-by-step explanation:
Using the motion Formula,
speed = distance/time.
This means:
distance = speed * time.
To find the value of "s" in the question, we have to calculate the distance both trains travelled in terms of "s" and sum it to give us 300miles.
For train A,
Speed = S miles per hour
time taken to reach current position= 7hours.
Hence, the distance travelled by train A
Distance A = 7s.
For train B,
Speed= (S + 10)miles per hour.
time taken to reach current position= 5hours (since train B left two hours after the departure of train A)
Distance = speed * time
Distance B = (S + 10) * 5
Distance B = 5s + 50.
Hence, adding both distance to sum up to 300miles, it becomes:
300 = 7s + 5s + 50
300-50 = 12s
250 = 12s
s = 20.833mph.
There is 16 ounces in one pound divided 16 and 1/4 which equals 16/4
