Which of the following is NOT an example of an exact number? The hexagon has 6 sides.
There are 3 wheels on a tricycle.
The desk is 84 cm long.
The table has 4 legs.

This line graph compares the growth of plants that were kept in the sun for different amounts of time.a)  on day 7, the plants kept in the sun for 3 hours were how tall? b)  on day 7, the plants kept in the sun for 6 hours were how tall? c)    on day 10, the plants kept in the sun for 9 hours were how tall? d)  on day 11, the plant that was grown with 1 hour of sunlight was how tall? e)  based on the graph, the plant grows best in what amount of sunlight?

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Which fact represents evidence for the big bang theory?