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Lemur [1.5K]
3 years ago
9

Martin runs a 5 kilometer race in 25 minutes. What is his unit rate?

Mathematics
1 answer:
SOVA2 [1]3 years ago
4 0

Answer:

[ 60/25 ] x 5 km/h = 12 km/h

Step-by-step explanation:

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5. A silo was constructed at a farm in the shape of a right circular cylinder. It was built with an
MakcuM [25]

Answer: 112 meters

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

  • Volume of a cylinder (V) : π x radius ² x height

Replacing with the values given :

842,411 = π x r ² x 85

Solving for r:

842,411 / (π x 85) = r²

3,154.67 = r²

√3,154.67 = r

56.16 m = r

Finally, we have to multiply the radius by 2 to obtain the diameter:

56.16 x 2 = 112 meters

Feel free to ask for more if needed or if you did not understand something  

8 0
3 years ago
If someone tells you your body temperature is 98.6°, what scale is being used? How do you know?
Alla [95]

Answer:

Fahrenheit

Step-by-step explanation:

When I am getting my temperature checked, it is usually checked in Fahrenheit, and my temperature is around 98.6 degrees.

6 0
3 years ago
What number is 15 less than 63?​
wariber [46]

Answer:

48

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Jerome burns 4 cal/min walking and 10 cal/min running. He walks between 10 and 20 min each day and runs between 30 and 45 min ea
erik [133]

Answer:

20 minutes should spend on walking and 30 minutes on running.

Step-by-step explanation:

Let x represents the minutes spent on walking and y represents the minutes spent on running,

∵ He burns 4 cal/min walking and 10 cal/min running,

So, the total calories burnt,

Z = 4x + 10y

Which has to be maximised.

Now, he walks between 10 and 20 min each day,

i.e. 10 < x < 20,

Also, he runs between 30 and 45 min each day,

i.e. 30 <  y < 45,

By graphing 10 < x < 20 and 30 <  y < 45,

We obtained the vertices of feasible region,

(10, 45), (20, 45), (10, 30) and (20, 30)

At (10, 45),

Z = 4(10) + 10(45) = 40 + 450 = 490,

At (20, 45),

Z = 4(20) + 10(45) = 80 + 450 = 530,

At (10, 30),

Z = 4(10) + 10(30) = 40 + 300 = 340,

At (20, 30)

Z = 4(20) + 10(30) = 80 + 300 = 380

Hence, maximum calories is 530 when 20 minutes spent on walking and 30 minutes spent on running.

5 0
3 years ago
The temperature in a greenhouse should be 66 degrees or higher. One​ morning, the heater stopped working. The temperature droppe
erastova [34]

Answer:

The temperature in the greenhouse was at least 68 degrees before the heater stopped working.

Step-by-step explanation:

It was at 68 then it dropped by 2 degrees.

8 0
3 years ago
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