Answer: 0.0668
Step-by-step explanation:
Given: Mean :
Standard deviation :
The formula to calculate z-score is given by :_
For x= 4 minutes , we have
The P-value =
Hence, the probability that on a given run, the time will be 4 minutes or less = 0.0668
Answer:
B. 152 cm²
Step-by-step explanation:
To find the surface area using a net, do this:
Take apart the figure. We see that there are three rectangles and two triangles. Find the area of each () and then add the values together:
The first rectangle on the left is the same as the one on the right.
Two measures are 40 cm².
The middle rectangle is:
48 cm²
The formula for the area of a triangle is :
The area of the two triangles is 12 cm².
Now add the values:
The area of the figure is 152 cm².
:Done