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, $ 200,000 625,000the δb/c ratio is?

Iam stuck on one problem. my mind is in absoloute vacation mode. i literallty just need to finish this to be done will give brainliest and all my points if i have to! 1- point free throw and 2- point feild goal. he made 35 shots, and scored 62 points how many of each shot did he make in 1 minute? (i already did the math. he made 8 1-point free throws and 27 2-point feild goals.) 1. write two equations for the problem. (i had a major brain fart.)

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.