One of two alternatives will be selected to reduce flood damage in a rural community in central arizona. the estimates associated with each alternative are available. use b/c analysis at a discount rate of 10% per year over a 20-year study period to determine which alternative should be selected. for analysis purposes only, assume the flood damage would be prevented in years 3, 9, and 18 of the study period. retention pond channel initial cost, $ 880,000 1,500,000 annual maintenance , $/year 92,000 30,000 reduced flood damage, $ 200,000 625,000
the δb/c ratio is?

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

practice. practice. practice.

60.9774

step-by-step explanation:

because when you add 47.6 plus 7.32 equals 54.92

and when you add .0574 + 6= 6.0574

and when you add 54.92 and 6.0574 you get the answer of 60.9774.

plzz mark brainlest last one got deleted. cause i didn't explain it but i did but i understand what the mod meant

it would be a on edgenuit y

the diagram below is your final answer