Answer:
after 11.07secs
Step-by-step explanation:
Given the height of an object modeled by the equation
H = 16T² - 1960
The height of the object on the surface of water is zero, hence H = 0
Substitute
0 =16T² - 1960
Swap
16T² - 1960 = 0
16T² = 1960
T² = 1960/16
T² = 122.5
T = 11.07
Hence the rock will hit the surface of the water after 11.07secs
Answer:
Advantages:
- It is easier for people to choose an option rather than to write an essay. The questionnaire reflects what the person is thinking and what the person's point of view is, which as a result makes it easier to analyze and conclude results
- A wide range of questions can be asked within one questionnaire, which makes it an effective way to conduct a survey/test
Disadvantages:
- A person has to read carefully in order to answer each question and sometimes there is lack of concentration by the person filling in the questionnaire
- It is slightly difficult to write an effective questionnaire, that would able to test a vast knowledge/ conduct a survey so that an effective analysis can be done
Step-by-step explanation:
Answer:
13 1/3 miles per hour
Step-by-step explanation:
Take the distance and divide by the time
1 1/3 ÷ 1/10
Change to an improper fraction
4/3 ÷ 1/10
Copy dot flip
4/3 * 10/1
40/3 miles per hour
changing to a mixed number
13 1/3 miles per hour
Answer:
Presents
Step-by-step explanation:
