Question

Help please I’m not good at math

Answer 1

Answer:

1,680

Step-by-step explanation:

We know a hummingbird beats its wings 420 times in 30 seconds. To find the unit rate, divide 420 by 30.

420/30

42/3

14 beats/second

Now we know a hummingbird beats its wings 14 times in 1 second. Two minutes equals 120 seconds. Multiply 14 by 120 to get the answer here.

14 * 120

(14 * 12) * 10

168 * 10

1,680 beats

Answer 2

Answer:

1680

Step-by-step explanation:

From the table, we can see that per each 30 seconds, a mocking bird flaps its wings 420 times.

Each minute contains 60 seconds. Therefore, in order to calculate the number of times a mockingbird flaps its wings in 2 minutes, we can

60 seconds x 2 minutes = 120

Then, we can divide this number by 30 to figure out how many times we need to multiply 420 to get our answer.

120/30 = 4

Therefore,

420 x 4 = 1680