attic
25.05.2021 •
Mathematics
After a 3 hour snow storm there are 9 inches of snow on the road. What is the rate per inch?
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Ответ:
I inch per hour for 2 hours = 2 inches
2 inches per hour for 6 hours = 6*2 = 12 inches
1 inch per hour for 1 hour = 1 inch
2+12+1 = 15 inches of snow total
Step-by-step explanation:
credit to: musiclover10045
Ответ:
Answers:
w = 10 ft and l = 50 ft > second option
w = 20 ft and l = 60 ft > third option
w = 50 ft and l = 40 ft > fifth option
Explanation:
We are given that:
length should be at least 20 > length ≥ 20
equation for perimeter is : 2l + 2w ≤ 200
We will check each option as follows:
Option 1:
w = 50 ft and l = 10 ft
This option is incorrect as the proposed length is less than 20.
Option 2:
w = 10 ft and l = 50 ft
Since the length is greater than 20, the first condition is satisfied.
Now, we check the second condition:
2l + 2w = 2(50) + 2(10) = 100 + 20 = 120 ≤ 200
The second condition is also satisfied.
This option is correct
Option 3:
w = 20 ft and l = 60 ft
Since the length is greater than 20, the first condition is satisfied.
Now, we check the second condition:
2l + 2w = 2(60) + 2(20) = 120 + 40 = 160 ≤ 200
The second condition is also satisfied.
This option is correct
Option 4:
w = 90 ft and l = 30 ft
Since the length is greater than 20, the first condition is satisfied.
Now, we check the second condition:
2l + 2w = 2(30) + 2(90) = 60 + 180 = 240 > 200
The second condition is not satisfied.
This option is incorrect
Option 5:
w = 50 ft and l = 40 ft
Since the length is greater than 20, the first condition is satisfied.
Now, we check the second condition:
2l + 2w = 2(50) + 2(40) = 100 + 80 = 180 ≤ 200
The second condition is also satisfied.
This option is correct