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2 (4 + 3) = (2 x 4) + 3
2 answers:
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Answer:
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable
Answer:
4.75% probability that the battery will last more than 9 hours before running out of power
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 the battery will last more than 9 hours before running out of power g
This is 1 subtracted by the pvalue of Z when X = 9. So
has a pvalue of 0.9525
1 - 0.9525 = 0.0475
4.75% probability that the battery will last more than 9 hours before running out of power
Given that each of the brick is 
ft tall and the finished stack of bricks is 
ft tall.
Let the number of bricks in the stack be x, then
Therefore, 7 bricks will go in the stack.
Let the number of bricks in the stack be x, then
Therefore, 7 bricks will go in the stack.