Mary is planning to buy a mobile phone that costs $500. a salesperson at the store informs her about four different installment plans that she can choose from.

plan a: a down payment of $50 and monthly payments of $40 for 12 months
plan b: a down payment of $100 and monthly payments of $80 for 6 months
plan c: no down payment and monthly payments of $60 for 12 months
plan d: no down payment and monthly payments of $100 for 6 months

which plan will have the highest finance charge?

the answer is 489

step-by-step explanation:

answer

step-by-step explanation:

what steps are you having us

step-by-step explanation:

let's first notice, the center of the hyperbola is at the origin, since the focus points are equidistantly 3 units away from the origin, that also means that the distance "c" from the center to either focus is 3.

it should also be notable that, the traverse axis for this hyperbola is vertical, or namely over the y-axis and therefore, the positive fraction will be the one with y-variable.

the traverse "a" component or distance from the center to either vertex is not 2, is more than 2, so we can safely put it at √5 ≈ 2.24.