The test grades of a science class are given. 78, 75, 70, 92, 69, 83, 98, 76, 75, 82, 91, 89. the grades are normally distributed with a mean of 81.5 and a standard deviation of 9.3. what is the z-score of the highest grade in the test? round the answer to the nearest hundredth. a. -1.77 b. -0.81 c. 0.81 d. 1.77

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step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

the square root of 16 is 4.

4*4 = 16

you have to find the same variables -3n - 5n so this would be -3n +(-5n) which equals -9n