Sally gets £12 pocket money per week. She spends £3.50 on bus fare. What fraction of her weekly pocket money does she spend on bus fare?

Extra points! find the missing dimension! need asap

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?