GIVING BRAIN TO CORRECT ANSWER!! The table shows the heights of 10 randomly selected second-grade students.

Helght (Inches)

44 45 47 49 48 48 49 50 48 52

Based on the data, select the most reasonable prediction about the height of second-grade students.

O A. The typical second-grade student is less than 45 inches tall.

B. The typical second-grade student is about 45 inches tall.

C. The typical second-grade student is more than 50 inches tall.

D. The typical second-grade student is about 48 inches tall.​

I would think D, not 100 percent sure though

Step-by-step explanation:

Answer = D

Step-by-step explanation:

If you add all of the heights up you get 480. divide that by ten (because there were 10 students whose height was taken) then you get 48. therefore, the typical second-grade student is about 48 inches tall.

I hope this helps have a good day :)

a is the correct

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240