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
This situation can be represented by a step function.If Jalyn purchases 60 shirts the total cost will be $600.At these prices it is cheaper to buy 76 shirts than it is to buy 75 shirts.
Answer:
The correct answers are 40, 120, 240, and 320
Step-by-step explanation:
.
Answer:
24 centimeters squared(cm²)
Step-by-step explanation:
The triangle below has been reduced by a scale of 0.4.
A large triangle has a base of 30 centimeters and height of 10 centimeters.
Hence, reducing the large triangle by the given scale ratio, we have :
Height = 10cm × 0.4 = 4cm
Base = 30cm × 0.4 = 12 cm
Hence, the area of the smaller triangle
= Area = 1/2 × Base × Height
Height = 4 cm
Base = 12 cm
Area = 1/2 × 4 × 12
= 24 cm²
