sarah lives in a part of the country where there are droughts. consequently the water company increases the cost per ccf of water based on usage. the piecewise function shows the rate of the schedule. { 0.18(x) when X is less than or equal to 160c(x) { 0.18(160) + 0.22(x-160) when 160 is less than X less than or equal to 240 {0.18(160) + 0.22(x-160) + 0.24(x-240) when X is greater than 240If sarah used 210 ccf of water last month, what was she charged ? A: 37.80 B : 38.80 C : 39.80 D : 47.00 Show your work