-2(2-2x)-4(x-5) is less than or equal to -24
1 answer:
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Answer:
The singers can finish first through fifth in 360360 ways.
Step-by-step explanation:
The order of the singers is important, because they are ranked by positions. So we use the permutations formula to solve this question.
Permutations formula:
The number of possible permutations of x elements from a set of n elements is given by the following formula:
In this question:
Top five singers, from 15 finalists. So
The singers can finish first through fifth in 360360 ways.
Answer:
x = 2.564 ( to 3 dec. places )
Step-by-step explanation:
Using the rule of logarithms
log ⇔ n logx
Given
= 62 ( take the ln of both sides )
ln = ln 62, that is
x ln5 = ln 62 ( divide both sides by ln 5 )
x = ≈ 2.564