Answer:
13 * 18 = 234 yards of ribbon
Step-by-step explanation:
Each spool has 18 yards of ribbon and Eleanor bought 13 spools. Hence, you can use multiplication to solve it
The number of months it will take for the total cost for both gyms to be equal is 1 month
<h3>How to write and solve total cost equation</h3>
let
x = number of months
Gym A:
C = 20 + 30x
Gym B:
C = 50x
20 + 30x = 50x
20 = 50x - 30x
20 = 20x
x = 20/20
x = 1 months
Therefore, the number of months it will take for the total cost for both gyms to be equal is 1 month
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Answer:
b i think
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given
---- proportion of watches with defects
--- Number of watches
Solving (a): Represent at least 215 of 400 are defective
In inequalities, at least means:
So, the probability is represented as:
Solving (b): Calculate
Normal or Poisson: Normal distribution is characterized by 2 parameters and .
These two parameters can be easily calculated from the given parameters in the question. So, we solve using normal distribution
Start by calculating the mean
Calculate standard deviation
By continuity correction, we have:
So, we have:
Calculating , we have:
Calculate z score
So, we have:
Using the z score probability table, we have:
So, we have: