Answer:
43,680 ways.
Step-by-step explanation:
We have been given that an experiment involves 16 participants. From these, a group of 4 participants is to be tested under a special condition. We are asked to find the number of groups of 4 participants that can be chosen, assuming that the order in which the participants are chosen is irrelevant.
We will use permutations formula to solve our given problem.
For our given problem 
and 
.
Therefore, 4 participants can be chosen in 43,680 different ways.
Answer:
-8 hours/week
Step-by-step explanation:
Erik = 4 hours/week
Little Brother = 12 hours/week
How many more hours does Eric ride his bike during the week than his little brother?
Erik - Little Brother = (4 hrs/wk - 12 hrs/wk)
Erik rides his bike -8 hours/week more than his little brother.
Answer:
3. 29
4. 12
Step-by-step explanation:
I may have explained this a few more times than necessary, but agin the Pythagorean theorem. Plug in the numbers and square them. Add them, and then find the square root of that in the eNd.
Answer:
b
Step-by-step explanation:
Pythagoras formula for the relation of the side lengths of a right-angled triangle :
c² = a² + b²
c is the Hypotenuse (the side opposite of the 90 degree angle). a and b are the "legs".
so, we have here
c² = 1² + 2² = 1 + 4 = 5
c = sqrt(5) = 2.236067977...
so, answer option c is too big (values bigger than 3).
answer options d and e are too small (values smaller than 2).
a
9/4 = 2.25
10/4 = 2.5
this is also too big .
that leaves us with b
17/8 = 2.125
18/8 = 9/4 = 2.25
that is correct
