The table shows the value of a savings bond that doubles in value after 5 years. A 2-column table with 5 rows. The first column is labeled time since purchase (years) with entries 1, 2, 3, 4, 5. The second column is labeled value (dollars) with entries 57.50. 66.13, 76.14, 87.45, 100.57. Which statement describes the bond? The bond has an original value of $57.70 and grows at a rate of 15%. The bond has an original value of $57.50 and grows at a rate of 85%. The bond had an original value of $50 and grows at a rate of 15%. The bond has an original value of $50 and grows at a rate of 85%. C EDGE 2020

step-by-step explanation:

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

(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