Answer:
612 Hz.
Step-by-step explanation:
The frequency of the sound will be proportionally higher when coming towards you. The increase is related to the speed of the train.
So the frequency will be:
580 + (580 / 343) * 18.8
= 612 Hz.
This is called the Doppler effect.
If "d" is used to represent the depth of the river, that product will be
86d
1-.8=.2
za/2=.2/2=.1
invNorm(.1)=1.28
Lets get started :)
Diameter = 2.5 ft
Radius =

a) The Circumference formula of a circle is given in the picture below, we can plug-in the given information
C = 2

(1.25) or 2.5
≈ 7.85 ft (we can leave the answer in terms of pi {

})
b) We divide the total number of distance the tire will travel by the circumference to find how many times the tire will roll
(I have used the value in feet because we found the circumference in feet units and notice that I took the value of circumference to be 2.5

instead of 7.85, to increase accuracy)
672.2
The tire will rotate
672 times (a tire cannot roll a decimal times, so we take to the nearest whole number) to travel 1 mile
Answer:
x = 10
Step-by-step explanation:
