Step-by-step explanation:
ratio will be
30/27
= 10/9
=10:9
We must find UNIQUE combinations because choosing a,b,c,d... is the same as d,c,b,a...etc. For this type of problem you use the "n choose k" formula...
n!/(k!(n-k)!), n=total number of choices available, k=number of choices made..
In this case:
20!/(10!(20-10)!)
20!/(10!*10!)
184756
Answer:
h = -0.3d^2 + 1.2d + 1.5
Step-by-step explanation:
Answer: 23.80
Step-by-step explanation: