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3 years ago

7

A human heart beats an average of 80 beats per minute.How many beats is this in an hour?express your answer in scientific notati

ons

1 answer:

nlexa [21]3 years ago

4 0

Answer:

4,800

Step-by-step explanation:

Sorry I don't know how to explain it scientifically but I know how to do the calculations

1) Theres 60 minutes in an hour

2) 80x60= 4,800 beats

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Bryans rectangular kitchen has an area of 81 ft.² the kitchen is nine times as many square feet as Brian's pantry if the rectang

storchak [24]

The length of the pantry is 3 feet.

You start by dividing 81 by 9 since the pantry's area is 9 times the area of the whole kitchen. Then you divide the area of the pantry (which is 9 because 9 times 9 is 81) by 3 since length times width equals the area. You get 3 feet in the end.

Hope this helped :)

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3 years ago

Gabby left the mall and drove north. Violet left 3 hours later, driving 36 mph faster to catch up with Gabby. After 2 hours, she

Archy [21]

Answer:

24mph

Step-by-step explanation:

24 mph times 5 hours = 120 miles

24 mph + 36 mph = 60 mph

60 mph × 2 hours = 120 miles

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3 years ago

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3 years ago

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1.) 10 is a natural, whole, integer, rational or irrational number

Slav-nsk [51]

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3 years ago

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At a museum you can see the four cable lines that are used to pull cable cars up and down a hill. Each cable travels at a speed

borishaifa [10]

Answer:

54.514 rev/min

Step-by-step explanation:

Data provided in the question:

Speed of the cable car = 12.65 miles per hour

Diameter of the rotating wheel, d = 6.5 feet

Now,

The speed of rotation of the wheel will be equal to the speed of the cable car

thus,

The speed of rotation of the wheel = 12.65 miles per hour

also,

1 miles = 5280 feets

1 hour = 60 minutes

Thus,

The speed of rotation of the wheel = $\frac{12.65\times5280}{60}$

= 1113.2 ft/ min

Circumference of the wheel = πd

= 6.5π feet

= 20.42 feet

Therefore,

The speed of rotation of the wheel in revolutions per minute

= 1113.2 ÷ 20.42 rev/min

= 54.514 rev/min

6 0

3 years ago