The z-score of an observation equal to 25 from a population with mean 50 and a standard deviation equals to 10 equals: A.-3.5
B. -1.75
C. - 1.5
D. -2.5

The value is  

Step-by-step explanation:

From the question we are told that

   The the random selected observation    

    The mean is  

    The standard deviation is  

Generally z score is mathematically represented as

=>  

=>  

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

step-by-step explanation: 2