1) Last year, Springfield Middle School had 640 students. This year, it has 480 students. What is the percent of decrease? *

If my calculations are correct, it'd be 160% percent decrease

Step-by-step explanation:

you subtract 640 and 480, 640%-480%= 160%

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles