Answer:
A. cos(
)
Step-by-step explanation:
Typed the all the expressions into desmos and picked the ones that matched
Answer:
The answer is b. x= 2, -1
I do not understand why there are two decimal places.
But either ways if you are asking for :
0.0000489 then it is 4.89*10⁻⁵
0.489 then it is 4.89*10⁻¹
The trick is to count the zeroes to the first actual significant number you see and then write the number you counted with a negative sign for your power.
I hope this helps!
Well let's see.

The equation has exactly one solution.
Hope this helps.