The speed of the boat going with a current is 20 mph. When the boat goes against the current, the speed is 16 mph. Find the spee
1 answer:
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The value of x is 4
Step-by-step explanation:
The formula for simple interest is:
Here
P is principal amount
r is interest rate
and t is the time in years
We know
Interest = $840
Rate = r = 5%
P = $4200
Putting the values in the formula
Hence,
The value of x is 4
Keywords: Simple interest
Learn more about simple interest at:
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Answer:
The probability that the sample proportion will be greater than 13% is 0.99693.
Step-by-step explanation:
We are given that a large shipment of laser printers contained 18% defectives. A sample of size 340 is selected.
Let = <u><em>the sample proportion of defectives</em></u>.
The z-score probability distribution for the sample proportion is given by;
Z = ~ N(0,1)
where, p = population proportion of defective laser printers = 18%
n = sample size = 340
Now, the probability that the sample proportion will be greater than 13% is given by = P( > 0.13)
P( > 0.13) = P(
>
) = P(Z > -2.74) = P(Z < 2.74)
= <u>0.99693</u>
The above probability is calculated by looking at the value of x = 2.74 in the table which has an area of 0.99693.