Last year, the temperature in Rochester, NY, dropped from -3 F to -21 F in only 6 hours. if temperature changed by a steady amount during these hours, by how much did it change each hour?

Step-by-step explanation:

The temperature change that occurred was -21 - - 3 = - 18 degrees

This occurred in 6 hours.

-18/6  = - 3

So each hour during the six hours the temperature went down 3 degrees.

- 3

- 6      the first hour

-9       the second hour

-12      the third hour

-15       the fourth hour

-18        the fifth hour

-21        the sixth hour

5 times

Step-by-step explanation:

Assume the height of the streetlamp to be x

If you make a diagram from the details given by the question you should find two pairs of similar sides, from which you can form the equation

Solving this gives the height of the streetlamp as 30 feet. Divide this length by the height of the man to get the number of times the streetlamp is taller.