harry purchased a 600$ savings bond if he has 1200 in total in the bank at the end of 10 years what was the simple interest rate

R = 10%/year

Equation:

r = (1/t)(A/P - 1)

Solving our equation:

r = (1/10)((1200/600) - 1) = 0.1

r = 0.1

Converting r decimal to R a percentage

R = 0.1 * 100 = 10%/year

The interest rate required to get a total amount, principal plus interest, of $1,200.00 from simple interest on a principal of $600.00 over 10 years is 10% per year.

Step-by-step explanation:

so he has 600 $ saving then if he has 1,200 total in the bank

8496 cars

step-by-step explanation:

(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