I= prt
i = simple interest, p = principal, r = rate, t = time.
you want to study at the hogwarts school of witchcraft and wizardry after five years. you need 800 pieces of muggle-money to study there. you decide to deposit some pieces in the bank at an annual interest rate of %12.

The amount  we need to invest is 500 muggle money.

Step-by-step explanation:

Amount needle to study at Hogwarts = A = 800 muggle money

Principle amount that we need to invest = P

Duration of investment = T = 5 years

Rate if simple interest = R = 12%

Simple interest =  S.I

A = S.I + P

P =

The amount  we need to invest is 500 muggle money.

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: