You have to cross multiply
1/2=2/4
(1*4)=(2*2)
4=4
Answer: Dividing the number by 1000
When you move the decimal, add a 0.
The decimal is moved 3 times, there are 3 zeros. When you move left, the number is getting smaller so it is division.
Hope this helps ʕ•ᴥ•ʔ
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:
D
Step-by-step explanation:
−4−(−7)
=−4−(−7)
=−4+7
=3
Answer:
A, E
Step-by-step explanation:
Remember SOH-CAH-TOA:
Sine = Opposite / Hypotenuse
Cosine = Adjacent / Hypotenuse
Tangent = Opposite / Adjacent
Therefore, we can say:
sin 20° = LN / 8
cos 70° = LN / 8
tan 70° = MN / LN
Only the first and last options are correct.