Find the value of z so that the area under the standard normal curve from 0 to z is 0.4049 and z is positive.

1.31

Step-by-step explanation:

The z score shows the number of standard deviations by which the raw score is above or below the mean. If the raw score is above the mean then the z score is positive but if the raw score is less than the mean then the raw score is negative. The z score is given by:

If the area under the standard normal curve from 0 to z is 0.4049, the total area = 0.4049 + 0.5 = 0.9049

From the normal distribution table, the z score that corresponds to a probability of 0.9049 = 1.31

50-38=12

step-by-step explanation:

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i