Let

denote the number of minutes spent brushing his teeth, and let

be the mean and

the standard deviation for this distribution.

The z-score corresponding to this probability is approximately

, which means

Next, (note the sign change)

The corresponding z-score is approximately

, so you have

Solving the two equations for

and

, you'll find that the mean is approximately

and the standard deviation is approximately

.
20% * 300 = 2 * (10% * 300) = 2*30 = 60
7) A
8) C
9) B
I’m not certain but I hope this helps you...sorry if I got it wrong!!
Answer:
Angle A=Side MT
Angle M=Side AT
Angle T=Side AM
Step-by-step explanation:
Answer:
1 would be the coefficient for the variable term.
hope it helps!