Select the correct answer. a store sells 12-packs of ballpoint pens for $1.09 each and composition books for $2.79 each. cindy buys m packs of ballpoint pens and n composition books. the store offers a 5% discount for every 50th customer who makes a purchase. if cindy gets the 5% discount, which expression will represent cindy’s bill? a. 0.05 − 1.09m + 2.79n b. 1.05 + 1.09m + 2.79n c. 1.05(1.09m + 2.79n) d. 0.95(1.09m + 2.79n)

i believe it's a.

i'm not sure on this one, most likely correct.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

d. corresponding side lengths in similar triangles are proportional in length.

step-by-step explanation: