Step-by-step explanation:
(a-4) (a-5) = <em><u>a</u></em><em><u>^</u></em><em><u>2</u></em><em><u> </u></em><em><u> </u></em><em><u>-</u></em><em><u> </u></em><em><u>9</u></em><em><u>a</u></em><em><u> </u></em><em><u>+</u></em><em><u> </u></em><em><u>2</u></em><em><u>0</u></em>
<em><u>(</u></em><em><u>a</u></em><em><u>-</u></em><em><u>1</u></em><em><u>0</u></em><em><u>)</u></em><em><u> </u></em><em><u>(</u></em><em><u>a</u></em><em><u>-</u></em><em><u>2</u></em><em><u>)</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>a</u></em><em><u>^</u></em><em><u>2</u></em><em><u> </u></em><em><u>-</u></em><em><u> </u></em><em><u>1</u></em><em><u>2</u></em><em><u>a</u></em><em><u> </u></em><em><u>+</u></em><em><u> </u></em><em><u>2</u></em><em><u>0</u></em>
<em><u>(</u></em><em><u>a</u></em><em><u>-</u></em><em><u>4</u></em><em><u>)</u></em><em><u> </u></em><em><u>(</u></em><em><u>a</u></em><em><u>+</u></em><em><u>5</u></em><em><u>)</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>a</u></em><em><u>^</u></em><em><u>2</u></em><em><u> </u></em><em><u>+</u></em><em><u>a</u></em><em><u> </u></em><em><u>-</u></em><em><u> </u></em><em><u>2</u></em><em><u>0</u></em>
<em><u>(</u></em><em><u>a</u></em><em><u>-</u></em><em><u>1</u></em><em><u>0</u></em><em><u>)</u></em><em><u> </u></em><em><u>(</u></em><em><u>a</u></em><em><u>+</u></em><em><u>2</u></em><em><u>)</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>a</u></em><em><u>^</u></em><em><u>2</u></em><em><u> </u></em><em><u>-</u></em><em><u>8</u></em><em><u>a</u></em><em><u> </u></em><em><u>-</u></em><em><u> </u></em><em><u>2</u></em><em><u>0</u></em>
Answer:
A.0.4477
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

What is the probability that a randomly selected exam will require between 14 and 19 minutes to grade?
This probability is the pvalue of Z when X = 19 subtracted by the pvalue of Z when X = 14. So
X = 19



has a pvalue of 0.7389.
X = 14



has a pvalue of 0.2912
0.7389 - 0.2912 = 0.4477
So the correct answer is:
A.0.4477
3449995000 is what I got, I did 3.45x10^9 and then used that number and subtracted the answer from 0.5x10^4 to get the final answer, if that makes any sense.
Answer:
C. 60
Step-by-step explanation:
You can take away 120 instantly because that angle is acute. This leaves you with A, B, and C. It's most certainly too big to be C. By this point you can look at it and draw a 90 degree angle in your mind and you can see that it looks about 2/3 of a 90 degree angle.
May I have brainliest please? :)
Answer:
A C E
Step-by-step explanation: