It would be 5 im pretty sure...
In the given equation you have to simply multiply 9 with 499....
i.e. 9 * 499 = 4491
In this equation multiplying 9 with 499 is using distributive property because 9 is distributing with 499 to form 4491.
The answer to the first part is 26 i think
Bc 6-10 theres 10 and 10-15 theres 16
The answer is 16 degrees to your problem.
