Suppose 110 geology students measure the mass of an ore sample. Due to human error and limitations in the reliability of the balance, not all the readings are equal The results are found to closely approximate a normal curve, with mean 83 g and standard deviation 2 g. Use the symmetry of the normal curve and the empirical rule
as needed to estimate the number of students reporting readings between 81 g and 85 9.
The number of students reporting readings between 81 g and 85 g is
(Round to the nearest whole number as needed)

answer: a

step-by-step explanation:

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°

throw the computer

step-by-step explanation:

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