20+8q -88= -12
8q -68 = -12
8q = 68-12
8q = 56
q= 56/8
q= 7
Answer:
It would be to ask all the students in the grade.
Step-by-step explanation:
Answer:
D) 21
Step-by-step explanation:
The formula for finding the area of a triangle is A = 1/2 B x H. So, A = 1/2 (7)(6).
A = 1/2 (42)
A = 21.
So the area of the shaded region is 21 square units.
Answer:
The mean of depth is 12.75cm.
The variance of depth is of 13.02 cm².
Step-by-step explanation:
An uniform probability is a case of probability in which each outcome is equally as likely.
For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.
The mean of the uniform distribution is:

The variance of the uniform distribution is given by:

Uniform distribution on the interval (6.5, 19)
This means that: 
So
Mean:

The mean of depth is 12.75cm.
Variance:

The variance of depth is of 13.02 cm².