Answer: 285
Step-by-step explanation:
302 - 20 + 3
Hello!
First of all, we can subtract the stretching time. This gives us 20. If we divide by the four laps we get 5 minutes per lap.
Now, one lap is 400 meters (most tracks are), which is equal to 15,748.03 inches. This means it takes her five minutes to walk 15,748.03 inches. This is also equal to 300 seconds, so it takes her 300 minutes per 15,748.03 inches.
But if we round our big inches number to the nearest ten thousandth, we get 16,000, so in a simpler form her pace is 300/16,000. But we need to find in per second. Therefore we will divide by 300 to find how many inches she walks per second. This means she walks about 53.33 inches per second.
I hope this helps!
The third option makes the most sense because 2 times what ted would be 2x plus 8 more. 2x+8
C: 60.9% is the right answer
Step-by-step explanation:
The markup is calculated by using the formula
Given
Make Price = $22.99
Selling Price = $36.99
So the mark up will be:
Percent mark up will be:
Rounding off to the nearest hundredth percent
60.9%
Hence,
C: 60.9% is the right answer
Keywords: Markup, Percentage
Learn more about percentage at:
#LearnwithBrainly
Answer:
6 minutes
Step-by-step explanation:
'a' in the formula represents altitude in feet. You are told the altitude is 21000 feet, so put that into the formula:
21000 = 3400t +600
You can solve this for t:
20400 = 3400t . . . . . subtract 600 from both sides
6 = t . . . . . . . . . . . . . . . divide both sides by 3400
The problem statement tells you that t represents minutes after lift off, so this solution means the altitude is 21000 feet 6 minutes after lift off.
The question is asking for the number of minutes after lift off that the plane reaches an altitude of 21000 feet, so this answers the question directly:
The plane is at an altitude of 21000 feet 6 minutes after lift off.
