A restaurant sends customers in their loyalty program a coupon for a free birthday dessert. Suppose that 8% of the children and 12% of the adults redeem their coupons.
The restaurant takes separate random samples of 100 children and 90 adults from their loyalty program to see
the difference between the sample proportions (PC - PA).
What will be the shape of the sampling distribution of pc - PA, and why?

it will take 2.5 hours until Noah and Andre meet.

Step-by-step explanation:

Noah and Andre are 15 miles apart on a bike path when they start biking towards each other. This means that by the time they would meet, they would have covered a total distance of 15 miles.

Let t represent the time it would take for them to meet.

Distance = speed × time

Noah rides at a constant speed of 4 miles per hour. This means that the distance that Noah would cover in t hours is 4t

Andre rides at a constant speed of 2 miles per hour. This means that the distance that Andre would cover in t hours is 2t

Since the total distance is 15 miles, then

4t + 2t = 15

6t = 15

t = 15/6

t = 2.5 hours