Answer:
850
Step-by-step explanation:
Questions like this ("how much higher is x than y?") are answered by computing the ratio of the two quantities.
In fact, for example, the answer to "how much higher is 10 than 5?" is 2, because 10:5 = 2, and indeed 10 is twice as much as 5.
So, we have

So, the melting temperature of platinum is about one time and a half higher than the melting temperature of gold.
ANSWER
15.9
EXPLANATION
Given:
A right-triangle with two sides and an angle
Desired Outcome:
The value of x
Apply the SOH CAH TOA rule

Hence, the value of x is 15.9 (rounded to the nearest tenth).