Se quiere ir de paseo a la ciudad de Olmos, que está a una distancia de 90km. ¿a qué velocidad constante se debe ir para completar la distancia en 3 horas? Porfavor xD resuelvanlo bien -.- les daré coronita :v

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

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.

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great