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kirza4 [7]
3 years ago
11

Freidy is practicing for the marathon. It takes him 1.75 hours to run 12.25 miles. At this rate, how long will it take you to co

mplete the 26.2-mile marathon (round your answer to the nearest hundredth)?
Answer and explain ferly full brainliest
Mathematics
2 answers:
Alisiya [41]3 years ago
7 0
It will take him about 3.7 hours
Flauer [41]3 years ago
5 0

Answer:

It would take him about 3.7 hours to run 26.2 miles because he can run 7 miles per hour and 26.2/7 is 3.7....

Step-by-step explanation:

hope this helps :)

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A national survey showed that 44% of college students drink. A professor provided his own survey by choosing a random sample of
mamaluj [8]

Answer:

It is an unusual result contradicting the national survey.

Step-by-step explanation:

National survey showed 44% of college students who drink.

The professor's survey showed that 96/244 = 39% drink.

The professor's survey deviated from the national survey is 5% (44% - 39%) representing about 0.25% (5% squared) variance.

Standard deviation is the spread of a set of numbers from their mean.  In other words, it measures how far an observed value is from the mean. It can be calculated by getting the square root of the variance.

4 0
3 years ago
One number is 8 times a first number. A third number is 100 more than the first number. If the sum of the three is 690, find the
mezya [45]
<h3>Given</h3>

Three numbers are n, 8n, and (100+n).

Their total is 690.

<h3>Find</h3>

the three numbers

<h3>Solution</h3>

n + 8n + (n+100) = 690

10n + 100 = 690 . . . . . . . simplify

10n = 590 . . . . . . . . . . . . subtract 100

n = 59

8n = 472

n +100 = 159

The three numbers are 59, 472, and 159.

6 0
3 years ago
The lateral area of a cone is 400 pi cm^2. The radius is 10 cm. Find the slant height to the nearest tenth.
natka813 [3]

ANSWER

The slant height is 40cm.

EXPLANATION

The lateral area of a cone is given by:

Area= \pi \: r \: l

where r=10cm is the radius of the circle and l is the slant height.

It was also given that, the lateral area is 400π cm²

We substitute the values to get,

400\pi = \pi  \times \: 10 \times  \: l

We now divide both sides by 10π.

This implies that,

\frac{400 \pi}{10\pi}  = l

40 = l

Hence the slant height is 40cm.

8 0
3 years ago
A wire 27 ft long is cut into two pieces. Each piece is bent into the shape of a square. The perimeter of the larger square is t
Alexus [3.1K]

Answer:

Perimeter of the smaller square = 9 ft

Perimeter of the larger square = 18 ft

Step-by-step explanation:

Let

Perimeter of the smaller square = x

The perimeter of the larger square is twice the perimeter of the smaller square.

Perimeter of the larger square = 2x

Total Length of the piece of wire = 27 ft

Total = smaller + larger

27 = x + 2x

27 = 3x

x = 27/3

x = 9 ft

Perimeter of the smaller square = x

= 9 ft

Perimeter of the larger square = 2x

= 2(9)

= 18 ft

3 0
2 years ago
How do I find x? It’s for a riddle
Hunter-Best [27]

Answer:

106

Step-by-step explanation:

174-68=106

6 0
3 years ago
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