A standard normal distribution has a mean of zero; half the bell curve is to the left of zero and half to the right.
A standard normal distribution has a standard deviation of 1 and follows the 68-95-99.7 rule; e.g. 99.7% of the probability is between -3 and +3.
Choice a
Answer:
19 inch
Step-by-step explanation:
first it was ten inc,one week one inch therefore 1×9=9therefore 9+10= 19
5x+x=90 degree
x=90\6
x=15
5x=15*5=75
75+15=90degree
