Answer:
6-7
Step-by-step explanation:
simplyifying this we get
1+5i-8+i
= 6i-7
I am assuming the i you are talking about here is the sqrt of negative one so that would be 6-7
90/2 = 45
45/1700 = 0.02647
0.02647 x 100 = 2.64
2.46%
1a. (15x9)+(9x24)
135+216
351 ft squared
1b. 30 bags