Answer:
The annual rate is 1600
Step-by-step explanation:
I = P*R*T
R= P*T/I
Annually = 12 months
R= (10,800 * 12) / 81
R= 1,600
Answer:
I think its -7
Step-by-step explanation:
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Answer:
C. y=0.5x+3
Step-by-step explanation:
Answer:
74.22% probability that a family of four will spend more than $400.
Step-by-step explanation:
Problems of normally distributed samples can be 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 family of four will spend more than $400?
This is 1 subtracted by the pvalue of Z when X = 400. So



has a pvalue of 0.2578.
So there is a 1-0.2578 = 0.7422 = 74.22% probability that a family of four will spend more than $400.
Answer:
19+19+10+10= 58 is the answer