<span>fo = 335 Hz</span>let fo = frequency heard
<span>f = actual frequency </span>
<span>v= speed of sound </span>
<span>vs = speed of source </span>
<span>For the first one, </span>
<span>fo = fv/(v - vs) </span>
<span>74.5 km/h = 20.69 m/s </span>
<span>vs = -20.69m/s since it is moving away from you </span>
<span>fo = (415Hz)(346m/s)/(346m/s - (-20.69m/s)) </span>
<span>fo = 392 Hz </span>
<span>For the second one, </span>
<span>fo = fv/(v - vs) </span>
<span>82.8 km/h = 23 m/s </span>
<span>vs = 23m/s </span>
<span>fo = (312Hz)(331m/s)/(331m/s - (23m/s))
</span>
400%
= 400/100
= 4
As a decimal = 4.00
As a fraction = 4/1
Answer:
1/5 is equal to 20% so you multiply 48 by .20 and you get 9.6 and your take 9.6 and add it to 48. your answer will be 57.6
Answer:
Null Hypothesis: 
Alternative Hypothesis: 
Step-by-step explanation:
It is given that the mean height of a certain kind of plant is 171 centimeters.
Null Hypothesis: A hypotheses of no statistical significant difference is known as null hypothesis. The null hypotheses for this test is
Alternative Hypothesis: If a hypothesis is used in hypothesis testing that is contrary to the null hypothesis is known as alternative hypotheses. The alternative hypotheses for this test is
(2,5) is the correct answer
