Answer:
2.3%
Step-by-step explanation:
Imagine a standard normal curve with mean at 100 mg. One standard deviation above the mean would be 110 mg; two standard deviations 120 mg.
Draw a vertical line through x = 120. To answer this question, we must find the area under the curve to the left of x = 120 and then subtract this result from 1.00:
Using a calculator with probability distribution functions built in, we find the area to the left of x = 120 as follows:
normcdf(-100,120,100,10) = 0.977 => 1.000 - 0.977 = 0.023
The probability of extracting more than 120 mg of caffeine from 8 fluid ounces of coffee brewed in a drip machine is 2.3%
The correct answer of 1/3 is the decimal form of it which is 0.3 repeated (you can put a line on top of the 3). If not just leave it as 1/3 it is simplified as a fraction.
Answer:
12 inches
Step-by-step explanation:
let length be L
formula for perimeter of rectangle = 2( length + width )
2( L + 9) = 42
2L + 18 = 42
2L = 24
L = 12 inches
Answer:
x/y=2/9
y = 9/2 x
Step-by-step explanation:
hope it's helpful ❤❤ THANK YOU.
Answer: x = 3.05
Step-by-step explanation:
The picture shows the graphic solution using technology.
Verifying the approximate solution found on the graph.
x = 3.05
0.5x³ - 4 = 3x + 1
0.5(3.05)³ - 4 = 3(3.05) + 1
0.5*28.373 - 4 = 9.2 + 1
14.2 - 4 = 10.2
10.2 = 10.2 (ok)
