Answer: Percentage decrease = 20% × 7,720
New value = 7,720 - Percentage decreaseNew value =
7,720 - Percentage decrease =
7,720 - (20% × 7,720) =
7,720 - 20% × 7,720 =
(1 - 20%) × 7,720 =
(100% - 20%) × 7,720 =
80% × 7,720 =
80 ÷ 100 × 7,720 =
80 × 7,720 ÷ 100 =
617,600 ÷ 100 =
6,176
New value - 7,720 =
6,176 - 7,720 =
- 1,544
Step-by-step explanation:
Answer:
(1)
Step-by-step explanation:
Data given and notation
n=100 represent the random sample taken
estimated proportion with the survey
is the value that we want to test
represent the significance level
z would represent the statistic (variable of interest)
represent the p value (variable of interest)
Concepts and formulas to use
We need to conduct a hypothesis in order to test the claim that the true proportion is lower than 0.41.:
Null hypothesis:
Alternative hypothesis:
When we conduct a proportion test we need to use the z statistic, and the is given by:
(1)
The One-Sample Proportion Test is used to assess whether a population proportion is significantly different from a hypothesized value .
Calculate the statistic
Since we have all the info requires we can replace in formula (1) like this:
Answer:
-a + 15
General Formulas and Concepts:
<u>Pre-Algebra</u>
<u>Algebra I</u>
Step-by-step explanation:
<u>Step 1: Define</u>
3(a + 5) - 2(a + a)
<u>Step 2: Simplify</u>
- Combine like terms: 3(a + 5) - 2(2a)
- Distribute 3: 3a + 15 - 2(2a)
- Multiply: 3a + 15 - 4a
- Combine like terms: -a + 15
9514 1404 393
Answer:
20 : 7
Step-by-step explanation:
2 cm = 20 mm, so the ratio of white to colored fabric is ...
20 mm : 7 mm = 20 : 7