step 1: bobby: first you multiply 1.12 by $2.50, and you get $2.80. $2.80 is how much bobby spent.
step 2: carla: you have to do 1.4 times $2.20, and you'll get $3.08.
therefore, carla spent more money
answer: 160 ants
a(t) = ao*2^(t/10)
a(20) = 40*2^(20/10)
a(20) = 40*2^2
a(20) = 40*4 = 160 ants
i got 8, but i'm not sure.
so i first did -6 + 5, and i got -1 as an answer. then i did -1 plus 9 because both sides need to be equal. i wrote that x = 8 but that wasn't an option. i'm not sure if this was and i'm really sorry if it's not.
they are alternate exterior angles so they have the same amount degree angle. also look at the location of the rest of the problems and see they are on opposite sides but in the same place and they have the same degree. itll be the same for this problem.