Answer:
A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.
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Answer:45 mi/h
Step-by-step explanation:
Recall: Speed = distance / time
Let the time taken for the morning journey be and the time taken for the afternoon journey be ,and the distance covered be d
that means for the first journey,
30 =
d = 30
Also for the afternoon journey,
d = 60
Equating the two , since the same distance is being covered , we have
30 = 60
that is
=
= 2
Also ,
total distance covered = 30 + 60
Average speed = total distance / total time
= 30 + 60 / +
Recall that = 2 , substitute this into the formula for average speed , then we have
Average speed = 30(2) +60 / 3
Average speed = 120 / 3
Therefore :
Average speed = 40 mi/hr
The formula for the circumference of a circle is:
C=2πr
Since we know the radius is 14cm, we can solve for the circumference...
C=2π(14)
C=28πcm
C=<span>87.96cm</span>
X = 35
use the formula a^2 + b^2 = c^2 in order to find the hypotenuse, which is x.
21^2 + 28^2 = c^2
441 + 784 = c^2
1225 = c^2
35 = c
x = 35