7.  1.  2.  3.

12.  3(400) – 4(2000)+ (400) = 0

13.  17

15.  $4

19.  How much colder is the record low in Illinois than the record low in Texas? LowHigh Florida-2109 Illinois-37117

20.  35 Degrees

22.  B and D

23.  Simplify  (-9)(-6)(-5)

24. › -270

29.  A dolphin is swimming 40 ft below sea level and descends 35 ft in 1 minute. The dolphin will start to come up at 85 ft below sea level. How much farther down can the dolphin swim before he starts to come up?

30.  A dolphin is swimming 40 ft below seal level and descends 35 ft in 1 minute. The dolphin will start to come up at 85 ft below sea level. How much farther down can the dolphin swim before he starts to come up?  10 additional feet

34.  What is 2.13 written as a fraction in lowest terms?

49.  The retina has 122,400,000 rods. Write this number in scientific notation.

52.  2 times greater