Anormal distribution of data has a mean of 90 and a standard deviation of 18. what is the approximate z-score for the value 64? –3.6 –1.4 1.4 3.6

-1.4

Step-by-step explanation:

The approximate z-score for the value 64 is -1.4.

Step-by-step explanation:

Since, the z-score or standard score for the value x is,

Where,

is the mean score,

is the standard deviation,

Here, x = 64,

Hence, the z-score for the value 64 is,

Second option is correct.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!