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charle [14.2K]
3 years ago
13

Melissa averages a rate of 1.5 steps per second while walking. How many steps will she take in an hour if this rate continues?

Mathematics
1 answer:
Sonbull [250]3 years ago
6 0

Answer:

5400

Step-by-step explanation:

1.5×60=90 steps per min

90×60=5400 steps per hour

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D

Step-by-step explanation:

Hi there!

We're given the equation y=-75x-50, which represents a submarine DESCENDING towards the ocean floor, where y is the depth in feet, and x is the number of minutes the submarine is descending

Since the submarine is DESCENDING, we can immediately eliminate A and C, which talk about the submarine ASCENDING

That leaves B and D

Looking at the given equation, y=-75x-50, -75 is the slope, or rate of change, and -50 is the y intercept, or the "beginning" (where the equation will "start")

Therefore, the submarine will start at -50 feet, or 50 feet below sea level

As x is the number of minutes the submarine is descending, that means that if the submarine travels 1 minute, it will descend 75 feet (-75*1=-75), at 2 minutes, it'll descend 150 feet (-75*2=-150), and so on

So that means the submarine must be descending at a rate of 75 feet per minute

Therefore D is the correct answer

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Step-by-step explanation:

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