Wind turbines generate large amounts of electricity from wind energy. the blades on a wind turbine can revolve 22 times per minute. if a wind turbine runs for 1 hour, about how many times do the blades revolve? remember, there are 60 minutes in 1 hour.

1320 times  

Step-by-step explanation:

            Time = 1 h × (60 min/1 h) = 60 min

Revolutions = 60 min × (22 rev/1 min) = 1320 rev

The blades revolve 1320 times per hour.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have