Hello!
The mean is 86 and the standard deviation is 3
You see how many deviations are between 86 and 89
86 + 3 = 89
From the median to the first deviation is where 34.1% of the results fall
Convert the percent to a decimal
34.1% = 0.341
Multiply this by the amount of test taken
200*0.341 = 68.2
The answer is B)68
Hope this helps!
For 39% of all observations that are greater than z on the normal distribution table, the percentage of observations that are lesser than z is
100 - 39 = 61%
The proportion is 61/100 = 0.61
From the normal distribution table, the value of z corresponding to this proportion is 0.28
Thus, the required value of z is 0.28
Answer:
14n=t
Step-by-step explanation:
6n+8n=t
14n=t
just plug in numbers for n or t if you're trying to find something specific, but there's the equation.
Answer:
x= 6 and b= 126°
Step-by-step explanation:
okay the first step to solving this is understanding what are the properties of ∠A and ∠B.
so the angles are equal to each other because they are alternate interior angles.
if that is settled it means the equation for both angles would be equal to each other as well.
∠A= 8x + 78° ∠B= 2x + 114°
therefore: 8x + 78= 2x + 114
then solve for x:
- isolate x and the answer is equal to 6 at the end
now you are looking for angle b, so you input x which is 6 into the equation;
= 2(6) + 114°
=12 + 114°
=126°
Answer:
the answers you chose are correct.
Step-by-step explanation
b and d