A person borrows rs 80000 at 12% per anum .the principal and interest are to be paid in 11 monthly installments doubling each installment from its previous one calculate first and last payment

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

1; 35 is the ratio

step-by-step explanation:

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.