I just looked it up and it said it is 180
I would say c as the answer
So D would be going up because it is positive. It is going up 10ft, once again cause the integer is a positive 10. Now E will be going down because it is a negative. Therefore it will go down 15ft for the reason being the integer is negative 15. Hope this helps.
Answer:
the right answer is 
Step-by-step explanation:
to find the reason for the sequence, the following formula must be used;
q = t2 / t1
where t2 is equal to the second value of the sequence and t1 to the first value.
q= t2/t1
q = 
<span>an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.</span>
