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____ [38]
3 years ago
5

Last week at the park Haeather ran 4 miles in 48 minutes when she runs her next race she Hope's to improve her time by 2 minutes

per mile
Last week at the park what was haeather rate of speed in miles per hour ​
Mathematics
1 answer:
Korvikt [17]3 years ago
3 0

Answer:

Haeather ran at a speed of 5 miles per hour.

Step-by-step explanation:

Given that last week at the park Haeather ran 4 miles in 48 minutes, to determine what was Haeather rate of speed in miles per hour the following mathematical calculation must be performed:

48/4 = 12

Thus, Haeather ran 1 mile every 12 minutes.

60/12 = 5

1 x 5 = 5

Therefore, Haeather ran at a speed of 5 miles per hour.

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On a city map, a library is located at (6, 2) and a school is located at (3, 3). If each unit equals one mile, what is the dista
Marizza181 [45]

Answer:

<em>3.2 miles</em>

Step-by-step explanation:

Given the coordinate  point (6,2) and (3,3)

The distance between the two points is expressed using the formula;

D = √(x2-x1)²+(y2-y1)²

D = √(3-2)²+(3-6)²

D = √1²+(-3)²

D = √1+9

D = √10

D = 3.2

<em>Hence the distance (in a straight line) between the library and the school rounded to the nearest tenth is 3.2 miles</em>

8 0
3 years ago
A researcher collects a simple random sample of​ grade-point averages of statistics​ students, and she calculates the mean of th
anyanavicka [17]

Answer:

a. The sample has more than 30 grade-point averages.

Step-by-step explanation:

Given that a researcher collects a simple random sample of​ grade-point averages of statistics​ students, and she calculates the mean of this sample

We are asked to find the conditions under which  that sample mean can be treated as a value from a population having a normal​ distribution

Recall central limit theorem here

The central limit theorem states that the mean of all sample means will follow a normal distribution irrespective of the original distribution to which the data belonged to provided that

i) the samples are drawn at random

ii) The sample size should be atleast 30

Hence here we find that the correct conditions is a.

Only option a is right

a. The sample has more than 30 grade-point averages.

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

a. given

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Aman is adding -17 + 9. He wants to write -17 as the sum of two numbers so that one of the numbers, when added to 9, will equal
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answer is ‘see analysis’

Step-by-step explanation:

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