To solve this question, you must either divide 20 by 8, or you can try multiplying each answer by 8. To divide this, figure out how many times 20 goes into 8. It goes in 2 times, equalling 16. Now subtract 20 by 16 to find the remainder which is 4. Your answer is A: 2r 4. Hope this helped!
Answer:
The area of the figure is 49.12ft² (nearest hundredth)
Step-by-step explanation:
The area of the figure is the sum of the areas of the right triangle and semi circle that make up the figure.
Note that the radius of a circle is twice its diameter
That means, the radius of the semi-circle is 4 feet
Area of the triangle = 1/2 x Base X Height = 1/2 x 6 ft x 8 ft =24 ft²
Area of the semi circle = 1/2 πr² = 1/2 x 3.14 x 4² = 25.12 ft²
Hence, the area of the figure is:
24 ft² + 25.12 ft² = 49.12 ft²
Answer:
4% of all adults go to a health club at least twice a week
Step-by-step explanation:
- the proportion of adults who belong to health clubs is 10% that is 0.10
- the proportion of these adults (health club members) go to the club at least twice a week is 40%, that is 0.40.
Thus, the proportion of all adults go to a health club at least twice a week is
0.10 × 0.40 = 0.04, that is 4%
Answer: X = 8
Step-by-step explanation:
Answer:
Since the p value is higher than the significance level so then we can conclude that we have enough evidence to FAIL to reject the null hypothesis and there is no evidence in order to say that the true proportion of teens more than a quarter of Americans age 16 to 17 have sent a text message while driving is higher than 0.25
Step-by-step explanation:
Information provided
n=282 represent the sample selected
X=71 represent the teens indicated that they had sent a text message while driving
estimated proportion of teens indicated that they had sent a text message while driving
is the value that we want to test
represent the significance level
z would represent the statistic
represent the p value
System of hypothesis
We want to check if more than a quarter of Americans age 16 to 17 have sent a text message while driving, and the hypothesis are:
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Replacing we got:
Decision
The p value for this case is:
Since the p value is higher than the significance level so then we can conclude that we have enough evidence to FAIL to reject the null hypothesis and there is no evidence in order to say that the true proportion of teens more than a quarter of Americans age 16 to 17 have sent a text message while driving is higher than 0.25
