Answer:
-0.28
Step-by-step explanation:
(1/5) : (-5/7)=(1*5)/(5*(-5))=-(7/25)=-0.28
Answer:
to be fair this looks hard but i can do just give me five mins
Step-by-step explanation:
We have been given that a set of art exam scores are normally distributed with a mean of 81 points and a standard deviation of 10 points. Kamil got a score of 78 points on the exam. We are asked to find the proportion of exam scores that are lower than Kamil's score.
First of all, we will find z-score corresponding to 78.
, where,
z = z-score,
x = Random sample score,
= Mean,
= Standard deviation.
![z=\frac{78-81}{10}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B78-81%7D%7B10%7D)
![z=\frac{-3}{10}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B-3%7D%7B10%7D)
![z=-0.3](https://tex.z-dn.net/?f=z%3D-0.3)
Now we will use normal distribution table to find the probability under a z-score of
that is
.
![P(z](https://tex.z-dn.net/?f=P%28z%3C-0.3%29%3D0.38209)
Upon rounding to 4 decimal places, we will get:
![P(z](https://tex.z-dn.net/?f=P%28z%3C-0.3%29%5Capprox%200.3821)
Therefore,
of exam scores are lower than Kamil's score.
Answer:
To find the answer, you must multiply/divide the amount in cups by calories per cup.
Step-by-step explanation:
Butter only has 0.3 cups, so The calories will only be 30% of what is written down. 30% of 1627= <u>488.1 calories</u>
Marshmallows is 4.25 times larger then the calories per cup, so now you'll have to multiply.
4.25*159=<u>675.75 calories</u>
Finally, Cereal is 5.5 times larger then the calories per cup, so we will multiply again.
5.5*101=<u>555.5 calories</u>
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Finally, add all the number together to find the total amount of calories in the marshmallow treats.
555.5+675.75+488.1=<u>1,719.35 calories</u>
There is a total of 1,719.35 calories in the marshmallow treats.