The ages of people signed up for piano lessons are listed.

11, 16, 15, 9, 19, 12, 13, 13, 11, 11, 18, 17

what is the mode of the ages?

a.
12

b.
15

c.
13

d.
11

Guys i really need or i have to stay late up night

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?