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frutty [35]
3 years ago
14

the scores on a psychology exam were normally distributed with a mean of 56 and a standard deviation of 9. A failing grade on th

e exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing​ score?
Mathematics
1 answer:
bija089 [108]3 years ago
3 0

hey! i got a failing grade! this world is so small.

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One earthquake has MMS magnitude 3.9. If a second earthquake has 120 times as much energy (earth movement) as the first, find th
Anna71 [15]

Answer:

The right answer is "5.9". A further solving is provided below.

Step-by-step explanation:

The given values are:

Initial Magnitude,

M₁ = 3.9

Let Second magnitude be M₂.

Now,

⇒  M_2-M_1=log(\frac{l_2}{l_1} )

On substituting the values, we get

⇒  M_2-3.9 = log (120)

On putting the value of "log 120", we get

⇒  M_2-3.9=2.079

On adding "3.9" both sides, we get

⇒  M_2-3.9+3.9=2.079+3.9

⇒                    M_2=5.9

7 0
3 years ago
samantha has 20 marbles paul has m marbles. Of samantha has 6 times as many marbles as paul, write an equation to show how many
Morgarella [4.7K]

Answer:

20 = 6m  or  m = 20/6 = 10/3

Step-by-step explanation:

Let's say Samantha has s marbles and Paul has m marbles.

We know that s = 20 and that Samantha has 6 times as many marbles as Paul. This means s = 6m.

Substitute 20 in for s:

20 = 6m

m = 20/6

Thus, the equation is m = 20/6.

<em>~ an aesthetics lover</em>

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3 years ago
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I will give brainliest to whoever helps me with this question. Also, if you could please explain to me how you solved it I would
xxMikexx [17]

i think its 92 yd

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2 years ago
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Natalie walked 3/5 mile in 1/2 hour. How fast did she walk, in miles per hour
V125BC [204]

Answer:

6/5 miles per hour or 1.2 miles per hour

Step-by-step explanation:

If Natalie walked 3/5 miles in 1/2 hour, then in 1 hour she would have walker 6/5 miles(3/5 * 2). You can write 6/5 as 1.2 (6 divided by 5). Thus, Natalie walked 1.2 miles per hour

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3 years ago
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Find the slope of each graph. Express the answer in simplest form. Please show graph​
Sidana [21]

Answer:

Step-by-step explanation:

slope is -3/2. rise/run. There's already a graph there so I'm assuming no need to show one

7 0
3 years ago
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