To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330
6, 12, 18, 24.
8, 16, 24.
24 is your answer. Hoped I helped!
1) C(2
2) A(-4
3) B(4+(2+1)=4+2)+1
4) D(3(2x4)=(3x2)4
5) A(5+6=6+5
6) C(12x1=1x12
7) D(Exponents
8) A(addition and subtraction
9) A(55
10) B(19
Answer:
height = 70.756 m
Explanation:
To answer this question, we will use one of the equations of motion which is:
x = ut + 0.5at²
where:
x is the distance that we want to calculate
u is the initial velocity of the body = 0 (assuming the body starts from rest)
a is the acceleration due to gravity = 9.8 m/sec²
t is the time taken = 3.8 seconds
Substitute with the givens in the above equation to get the distance as follows:
x = ut + 0.5at²
x = 0(3.8) + 0.5(9.8)(3.8)²
x = 70.756 m
Hope this helps :)
