the answer is 7/9.
when you originally solve it, its 28/36. that simplified is 7/9.
Answer:
7/9
Step-by-step explanation: I took the test
Answer:
Arithmetic sequence.
Step-by-step explanation:
We have been given 9,5,1 and -3
We need to check what kind of sequence is this.
d is common difference we will check difference of consecutive terms.
We can see the difference between all the terms are same that is -4
So, this is an arithmetic sequence.
Arithmetic sequence is the sequence in which the difference between consecutive terms are same.
It takes 10 workers 5 days to complete a road repair when working 2 hours a day.
So, this becomes : man hours required to finish the work.
Given is, if 2 people work for 5 hours a day, then let the number of days to finish the road be = d
So, total man hours =
Now, or
Hence, it will take 10 days for 2 people working 5 hours daily, to complete the work.
It will take 10 days for 2 people working 5 hours a day to finish the road repair.
From the question;
10 workers can finish road repair in 5 days working 2 hours a day
We need to find;
The number of days required to complete the road repair by 2 workers working 5 hours a day.
Assuming the number of days required to complete the work is x
Number of working hours of 10 people is 10 hours ( 2 hours a day for 5 days)
Number of working hours of 2 people is 5x hours (5 hours a day for x days)
Note that; the number of workers or people is inversely related to the number of working hours.
Therefore;
Product of number of people and working hours or work done is a constant
Thus;
10 × 10 = 2 × 5x
100 = 10 x
x = 10
Therefore;
2 workers working 5 hours a day will require 10 days to complete the road repair.
Keywords: rate of work, number of hours, number of days required to complete the job.
Level: Middle school
Subject: Mathematics
Topic: Rate of work
0.000000000093
The number in scientific notation is .
To find the number in scientific notation.
Scientific Notation is the expression of a number n in the form a∗10b. where a is an integer such that 1≤|a|<10 and b is an integer too.
Move the decimal 11 times to right in the number so that the resulting number, m = 9.3, is greater than or equal to 1 but less than 10
Since to moved the decimal to the right the exponent n is negative
n = -11
So, Write in the scientific notation form,
So, the number in scientific notation is .
A.
2 · (n – 12)
B.
2 · n - 12
C.
2 · n ÷ 12
D.
12 – 2 · n