The number of permutations of 8 people taken 6 at a time is given by:
<span>Its a RIGHT ANGLED TRIANGLE.
GIVEN:
hypo=25
opposite and adjacent=15 and 20.
FORMULA:
hypotenuse^2 =opposite side^2 + adjacent side^2
25^2=15^2+20^2
625=225+400
400+225=625
so its a right angled triangle....................
understand??</span>
You want to find
meters per second.So meters goes over seconds

Now pull out the calculator.
You should get ≈

, or 7.4 meters per second
Let's say we have the base -2 and we raise it to the third power, what will happen?
Well,

.

Any negative base with an odd exponent will result in a negative answer, because, unlike even exponents and negative bases, the negatives will not cancel out.