WILL MARK BRAINLIEST
2 answers:
Answer:
Option A is correct.
Step-by-step explanation:
Twenty-six track and field athletes volunteered to participate in her study.
She randomly assigns 13 athletes to warm-up for 10 minutes.
All 26 participants sprint the same distance.
She calculates the mean for each group and determines that the mean for the warm-up group was 10.9 seconds, and the mean for the other group was 12.9 seconds.
Difference is seconds.
The difference in the means is not significant because a difference of 2 is not very likely.
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Answer:
34.54
Step-by-step explanation:
According to the scenario, computation of the given data are as follows,
Height (h) = 3.7 km
Base radius (r) = 3 km
We can calculate the volume of mountain by using following formula,
So, volume of cone = (1/3)πh
By putting the value in the formula, we get
= (1/3) π × × 3.7
= 11.1π
= 34.54
Hence, the volume of the mountain is 34.54 .
X - young
y - adult
y - adult
Answer:
it took him 3 hours to get to work
Step-by-step explanation:
For the first part of the trip, the executive covered a distance "d" in time 't" at 35 mph, therefore we can write that the time it took to get to the helicopter was:
which if the distance is in miles, will render the time in hours.
We can write something similar for the second part of the trip", using the same "t" since it took the same time as for the first one, and using for distance 169.5 - d (since it is the distance to complete the total traveled distance :
Now we equal those two equations because the time "t" is the same, and solve for "d":
Now, knowing the distance covered in the first trip, we can find the time of that first trip:
Therefore, the time it took for thye total trip is: 1.5 h + 1.5 h = 3 hours