The first day, Brian saw 31 birds and twice as many squirrels as birds. The second day, Brian saw 20 birds and 42 squirrels. Which of the following is a good estimation of how many birds and squirrels Brian saw in the two days?
110 birds and squirrels
150 birds and squirrels
190 birds and squirrels
230 birds and squirrels
270 birds and squirrels
To estimate how many birds and squirrels Brian saw in two days, we can add up the number of birds and squirrels he saw on each day. On the first day, he saw 31 birds and twice as many squirrels, which means he saw 31 x 2 = 62 squirrels. On the second day, he saw 20 birds and 42 squirrels. Adding these up, we get 31 + 62 + 20 + 42 = 155. Therefore, the closest estimate is 150 birds and squirrels.
So, the answer is:
150 birds and squirrels.