Sorry dwar i am expert in biology this math is beyond my brain capacities
The answer is 481.6, because 56% = 0.56, so just multiply 860 by 0.56 and u get 481.6
18)k=37
20)q=-17
22)c=-26
24)y=-76
26)r=20
28)n=-15
30)k=25.8
32)n=3.64
34)y=1/8
36)s=-17
38)x=67
40)x=-55
5x-25=5, x=6; multiply the 5 times x and negative 5, then add 25 to both sides, and divide by 5 to get 6.