(22.) You have the temperature changes listed correctly, you just messed up the math. -7 + 9 - 6 - 4 -17 + 9 = - 8°F
(23.) There are 76 fewer parks in Arizona which has 29. 76 + 29 = 105 parks in California
(24.) For the average, add up all values and divide by the number of them -6 + 0 + 2 + -9 + -5 + 10 + 1 -20 + 13 = - 7 there are 7 numbers average = - 7/7 = -1°F
