Arental car cost $20 per day and a room cost $50 per day for how many days can a room and a car be rented so that the total cost does not exceed $350

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?