No entiendo, es raz. matematico

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?

Abowl contained 270 starbursts of all different colors. if the probability of picking a yellow is 1/9, then how many yellow starbursts are in the bowl ? ?