answer:The area of a square is calculated by multiplying the length of one side by itself. So, if the area of square A is 25, then the length of one side of square A is √25 = 5. Similarly, if the area of square B is 81, then the length of one side of square B is √81 = 9. The length difference between the sides of square A and B is 9 - 5 = 4. 4 The answer is: 4

answer:If Pat's Ark & Athletic Wear store has 200 swimming pools, and Pat's Pool Supply has three times as many swimming pools, then Pat's Pool Supply has 3 * 200 = 600 swimming pools. The total number of swimming pools they have combined is 200 + 600 = 800 swimming pools. 800 The answer is: 800

answer:The sum of an arithmetic series is equal to the average of the first and last term, multiplied by the number of terms. In this case, the first term is -30, the last term is 50, and the number of terms is 50 - (-30) + 1 = 81. The average of -30 and 50 is (50 - 30)/2 = 20/2 = 10. Therefore, the sum of all the integers in this range is 10 times 81 = boxed{810}. The answer is: 810

answer:The total number of students attending the field trip is 109 + 115 + 118 = 342 students. The total number of teachers accompanying the students is 4 + 4 + 4 = 12 teachers. The total number of parents accompanying the students is 2 + 2 + 2 = 6 parents. The total number of people attending the field trip is 342 students + 12 teachers + 6 parents = 360 people. Since each school bus has a capacity of 72 seats, we divide the total number of people by the capacity of each bus: 360 people / 72 seats = 5 buses. Therefore, 5 buses are required for the field trip. 5 The answer is: 5