the cost of a plane ticket from pheonix to dallas cost $120 last week. This week, the same ticket will cost $165. What is the pe
1 answer:
Answer:
37.5%
Step-by-step explanation:
This week, the cost is higher when we compare to last week. Therefore, the percentage difference is given by comparing the price differences to the price for the previous week.
Difference in costs=165-120=45
Percentage difference with respect to last week's price=
Therefore, percentage increase is 37.5%
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Answer:
10β
Step-by-step explanation:
We can find this two ways, first by seeing in the step after it, cosines are canceled out. Since you already have 10β
on the next step, you can assume that (since only the cosines changed and the cosine next ot the blank was removed), the value is 10
β
.
You can also use double angle formulas from the previous step:
(sin(2β) = 2 sin(β) cos(β))and find that:
5 sin (2β) sin(β) = 5 * (2 sin(β) cos(β)) sin(β)) = (10 sin(β) sin(β)) cos(β) =
10β
cos(β)
But since cos(β) is already present, we can see that the answer is 10β