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algol [13]
3 years ago
12

A hiker walks at a speed of 3 2/5 km per hour. how many km will he walk in 3/4 of an hour

Mathematics
1 answer:
Art [367]3 years ago
6 0

Answer:

2.55

Step-by-step explanation:

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Imagine you asked students to draw an area model for the expression 5+4x2.
otez555 [7]

Answer:

area 1

Step-by-step explanation:

8 0
1 year ago
Forest covers an area of 3400 km^2. Each year this area decreases by 7.25%. What will the area be after 13 years
ELEN [110]

Area of 3400 decreases by 7.25%.

Rewrite 7.25% as a decimal.

This leads to 0.0725.

So, (3400)(0.0725) = 246.5.

Now (246.5)(13 years) = 3,276.

The area after 13 years will be

3,276 km^2.

8 0
3 years ago
What is the probability that a person who is above 35 years old has a hemoglobin level of 9 or above?
lorasvet [3.4K]

Answer:

Option C. P=0.531

Step-by-step explanation:

we know that

The probability of an event is the ratio of the size of the event space to the size of the sample space.  

The size of the sample space is the total number of possible outcomes  

The event space is the number of outcomes in the event you are interested in.  

so  

Let

x------> size of the event space  (total person's hemoglobin level of 9 or above with age above 35 years)

y-----> size of the sample space  (total person's age above 35 years)

so

P=\frac{x}{y}

In this problem we have

y=162

Complete the table to find the total person's hemoglobin level of 9 or above (person's age above 35)

Let

y------> total person's hemoglobin level between 9 and 11 (person's age above 35)

y+76+40=162

y=46

Find the value of x

x=46+40=86

substitute the values

P=\frac{86}{162}=0.531

4 0
4 years ago
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shepuryov [24]

Answer:

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8 0
3 years ago
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Pythagorean theorem
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3 √10
I think since a^2+b^2=c^2
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3 years ago
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