Maria invested $450 in a savings account and earned $126 in interest at the end of 7 years.What was the interest rate?
A.
3.5%
B.
4%
C.
4.5%
D.
5%
Answers
Given:
Principal = 450
Interest = 126
term = 7
rate = ?
Simple Interest is computed by multiplying the Principal, rate, and term.
Interest = P × r × t
126 = 450 × r × 7
126 = 3150r
r = 126/3150
r = 0.04 x 100% = 4%
To check:
I = 450 × 0.04 x 7
I = 18 × 7
I = 126
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Answers
So we basically know that:
Now here comes the tricky part. We have to determine how many rocks there are in each box.
The easy thing about this is that we already know what will be in the boxes after the movements. It's just
So now we know, that after the movements, each of the boxes will contain 12.
Lets do the operations on the boxes.
And we find that:
And from that, we get:
Hope that helped! Enjoy.
~Cam943, Junior Moderator
Answers
4 times a number means 4 times x or 4x
equal means =
14 is 14
-30+4x=14
add 30 boths ides
30-30+4x=14+30
0+4x=44
4x=44
divid by 4
4/4x=44/4
1x=11
x=11
+30 +30
_________
4x=44
---- -----
4 4
x=11
I think but don't kill me if it's wrong
In a normal distribution, the mean has Standard Score: z =
Answers
Using the normal distribution, it is found that the z-scores are:
1) z = -0.8
2) z = 2.4
3) z = 0
In a normal distribution with mean and standard deviation
, the z-score of a measure X is given by:
- It measures how many standard deviations the measure is from the mean, either above the mean(positive z-score), or below(negative z-score).
Item 1:
0.8 standard deviations below the mean, hence z = -0.8.
Item 2:
2.4 standard deviations above the mean, hence z = 2.4.
Item 3:
The mean is 0 standard deviations from itself, hence z = 0.
A similar problem is given at brainly.com/question/24663213
Final answer:
A standard score (z-score) signifies how many standard deviations a data point is away from the mean. A data value 0.8 standard deviations below the mean has a z-score of -0.8, meanwhile, if it is 2.4 standard deviations above the mean, its z-score is 2.4. The mean in a normal distribution has a z-score of 0.
Explanation:
In the field of statistics, a standard score (also known as a z-score) represents how many standard deviations an element is from the mean. In a normal distribution, a data value located 0.8 standard deviations below the mean has a Standard Score: z = -0.8. This is because the z-score is negative when the data value is below the mean. Conversely, a data value located 2.4 standard deviations above the mean has a Standard Score: z = 2.4. As the data value is above the mean, the z-score is positive. Finally, for the mean value itself in a normal distribution, the Standard Score: z = 0 because the mean value is the center of distribution, hence no deviation from itself.
Learn more about Standard Score here:
#SPJ3
Answers
so, 7/12 - 3/8 first you will always want to make the denominators even or the bottom #'s so to do that you have to find the GCD or greatest common denominator. Which would be 24. then you would have to do to the top what you did to the bottom by multiplying the top #'s by 2 for the first fraction (7/12) and then 3 for the denominator. now you just subtract the top numbers as if there wasn't even a fraction there. The bottom # doesn't change ever until you can simplify at the very end when you actually have an answer. so the answer would be 5/24 and that is as simplified as you can get it.
Answers
many he answer
miles ride
32 / 2.5 = 12.8
Answers
I hope that this helped you :3