Answer:
The change in height is 6/10 miles per hour and the entire descent will last 150 minutes (2 hours and 30 minutes)
Step-by-step explanation:
The gilder started 1 1/2 miles above the ground, in other words, it started miles above the ground. After 60 minutes it is now miles above the ground.
Therefore, the change in height in one hour is: miles.
Now, we know that the glide descends at a rate of 6/10 miles per hour, we can solve the second part of the problem using the rule of three (or proportions)
<em>If it takes it 60 minutes to descend 6/10 miles, how long it will take it to descend 15/10 miles?</em>
60 minutes --- 6/10= .6
x minutes ---- 15/10= 1.5
Therefore minutes
Thus, the entire descent will last 150 minutes.
Answer:
its c 48.08 im pretty sure
Step-by-step explanation:
There are 60 brown horses and 40 black horses and 20 spotted horses
<em><u>Solution:</u></em>
Given that there are 120 horses on a farm
of the horses are brown
<em><u>Number of brown horses are:</u></em>
Therefore, 1/2 of total number of horses are brown
of 120
of the horses are black
<em><u>Number of black horses are:</u></em>
Therefore, 1/3 of total number of horses are black
of 120
of the horses are spotted
<em><u>Number of spotted horses:</u></em>
Therefore, 1/6 of total number of horses are spotted
of 120
Thus there are 60 brown horses and 40 black horses and 20 spotted horses
Answer:
Check the explanation
Step-by-step explanation:
:proportion of male smoker lung deaths is same for the four given tar level categories.
:proportion of male smoker lung deaths is not the same for the four given tar level categories.
Expected frequency=1177/4=294.25
Tar level Observed Freq.(O) Expected Freq.(E) (O-E)^2/E
0-7 107 294.25 120.435
8-14 375 294.25 5.643
15-21 553 294.25 227.533
>=22 183 294.25 42.061
Total= 1177 1177 395.673
Total chi square score=395.673
df=4-1=3
p-value=CHIDIST(395.673,3)<0.001
p-value<0.001,Reject null hypothesis.
There is sufficient evidence that the proportion of male smoker lung deaths is not the same for the four given tar level categories.