Answer:
31 mpg
1705 miles
Step-by-step explanation:
310/20 = 31 mpg
30mi/gal (75 gallons) = 1705 miles
Answer:
The correct option is C.
Step-by-step explanation:
The time in first figure is 3:00 pm and the time in second figure is 4:30 pm.
So total time taken by car is
It means total time taken by car is 1.5 hour.
The distance in first figure is 50 miles and the speed in second figure is 155 miles.
So total distance travelled by car is
It means total distance travelled by car is 105 miles.
The formula of speed is
Therefore option B represents the solution. Option B is incorrect.
Multiply both sides by 1.5 hours.
Therefore option D represents the solution. Option D is incorrect.
Divide both sides by speed.
Therefore option A represents the solution. Option A is incorrect.
Option C can not represent the solution, therefore option C is correct.
Answer:
x = 49.5°
Step-by-step explanation:
∠ABC = 90°
∠CBD = 45%∠ABC
∠CBD = 0.45(90)
∠CBD = 40.5°
x = ∠ABC - ∠CBD
x = 90 - 40.5
<u>x = 49.5°</u>
Answer:
The answer is below
Step-by-step explanation:
How much sleep do high school students get on a typical school night? An interested student designed a survey to find out. To make data collection easier, the student surveyed the first 100
students to arrive at school on a particular morning. These students reported an average of 7.2 hours of sleep on the previous night.
(a) What type of sample did the student obtain?
(b) Explain why this sampling method is biased. Is 7.2 hours probably higher or lower than the true average amount of sleep last night for all students at the school? Why?
Solution:
a) A voluntary response sample is a sample made up of volunteers. It samples more people who have strong opinions and sample people who have less opinion on the survey. It is biased.
Convenience sample is a type of sampling where the group of people are conveniently selected from a population. It is biased.
Since the first 30 students to arrive at school on a particular morning was used, this is convenience sampling since only the first 30 was conveniently selected.
b) This sampling method is biased because the first 30 students are those who would have woken up earlier while those who woke up late would not be sampled.
This means that the 7.2 hours is lower than the true average amount of sleep last night for all students at the school
Step-by-step explanation:
Its answer should be 4.366117912↑-01