Answer:
Step-by-step explanation:
Answer:
-502.5 - 115 = - 617.5
63 1/4 - 2 1/5 =
63 - 2 = 61
1/4 - 1/5 = 5/20 - 4/20 = 1/20
so 63 1/4 - 2 1/5 = 61 1/20
after the sub dove, elevation level is - 617.5 and temp is 61 1/20 F
Step-by-step explanation:
Answer:
78.383%
Step-by-step explanation:
The pH of randomly selected swimming pools follows a normal distribution with mean 7.4 and standard deviation 0.22. A pool should have a pH between 7.2 and 7.8 so that chlorine treatment is effective.
Using z score formula
z = (x-μ)/σ, where
x is the raw score
μ is the population mean
σ is the population standard deviation.
For x = 7.2
z = 7.2 - 7.4/0.22
z = -0.90909
Probability value from Z-Table:
P(x = 7.2) = 0.18165
For x = 7.8
z = 7.8 - 7.4/0.22
z = 1.81818
Probability alue from Z-Table:
P(x = 7.8) = 0.96548
The probability of pools having an acceptable pH level(7.2 and 7.8)
= P(x = 7.8) - P(x = 7.2)
= 0.96548 - 0.18165
= 0.78383
Converting to percentage
0.78383 × 100
= 78.383%
The percentage of pools having an acceptable pH level is 78.383%
Answer:
6.75
Step-by-step explanation:
The term 6.75 is within absolute value bars. These bars force any term inside of them to be positive. Since 6.75 is already positive, the bars have no effect.
The term 6.75 is already simplified.
Answer:

Step-by-step explanation:
We first denote the inequalities of the number of shirts and skirts.
#Since you cannot make a negative number of shirts or skirts, the inequalities will be written as:

#We then represent the inequality of material.
-The material size is a production constraint as only 500 yards of material is available for use.
-The inequality is therefore written as:

#We then represent the inequality of time.
-The material size is a production constraint as only 800 hours available for use.
-The inequality is therefore written as:

We combine the three inequalities to represent the constraints
