Jill arranges quarters in stacks of increasing powers of 2, starting with the zeroth power (20). if she ends up with six stacks, how many coins has she used?

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

Is this a polynomial function? i need to know asap

Which situation is an example of an observational study?