se deja caer una pelota desde la azotea de un edificio; si tarda 6 s en llegar al piso ¿cuál es la altura del edificio? Y ¿con qué velocidad choca contra el piso?​

The value √10 and √15 are plotted on the number line

Solve for x in the equation x2 - 12x + 36 = 90. x= 6+3x/10 x=6+2/7 x= 12+3/22 x = 12+3/10

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?