Kari has $400 in a savings account the interest rate is 10% compounded annually which type of model best fits this situation

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?