It is assumed that the test results for a class follow a normal distribution with a mean of 78 and a standard deviation of 36. If you know that a student's grade is greater than 72, what is the probability that it is greater than 84

0.4337

Step-by-step explanation:

Let X represents the test results for a class that follow a normal distribution .

Given: Mean , Standard deviation  

Then, the probability that it is greater than 84 will be

Hence, the required probability = 0.4337

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45