Step-by-step explanation:
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1. if andrew earned 49.50 how many hours did he work?
1 answer:
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Answer:
The probability is
Step-by-step explanation:
From the question we are told that
The mean mileage of a tire is
The standard deviation is
The sample size is n = 209
Generally the standard error of mean is mathematically represented as
=>
=>
Generally the probability that the sample mean would differ from the population mean by less than 199 miles is mathematically represented as
=>
=>
=>
=>
From the z table the area under the normal curve to the left corresponding to 1.11 and -1.11 is
and
So
=>
A(x)=2x·√36-x²
this is the answer.
this is the answer.
Answer:
\angle ACB=40^{\circ}, \angle ABC=63^{\circ}
Step-by-step explanation:
Finding x:
We know that , because it's a straight line. So,
.
We know that the sum of the angles of any triangle will be .
So, we have that .
Combining like terms on the left gives .
Subtracting from both sides gives
.
Dividing both sides by gives
.
Finding missing angle measures:
.
.
So, and
and we're done!
Note: . Coincidence? If not, try and prove it!