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3 years ago

What was the average rate in miles per hour (problem shown in picture)

Mathematics

1 answer:

Vladimir79 [104]3 years ago

6 0

Answer:

39 miles/1 hr

Step-by-step explanation:

13m=20min

20x3=60min

60min=1hour

13x3=39

39m=1hour

unit rate:

39 miles/ 1 hr

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Let x1, x2, ...x64 be a random sample from a distribution with mean 64 and standard deviation 4. then mean and the standard devi

VARVARA [1.3K]

The mean of sample means is the same as the mean of the underlying distribution.

The standard deviation of sample means is the original distribution sample mean divided by the square root of the number of samples.

Mean of sample mean distribution: 64

SD of sample mean distribution: 4/√64 = 1/2

7 0

3 years ago

Rewrite each fraction with a denominator of 24 2/3 and 5/8

Tresset [83]

Answer:

2/3 = 16/24

5/8 = 15/24

Step-by-step explanation:

2/3= 16/24

5/8= 15/24

because if you multiply across $\frac{2}{3}$ by $\frac{8}{8}$ equal $\frac{16}{24}$

and if you multiply across $\frac{5}{8}$ by $\frac{3}{3}$ equal $\frac{14}{24}$

3 0

3 years ago

fgiga [73]

Answer:

1 1/5

Step-by-step explanation:

12/10=1.2 or 1 1/5

5 0

3 years ago

Alan needs to manufacture a circular metal plate with a perimeter of `10pi` centimeters. If the allowed error tolerance in the p

AnnZ [28]

The ideal radius Alan must control is $\frac{1}{2\pi }$ cm.

<h3>Define perimeter of circle.</h3>

The measurement of the circle's perimeter, also known as its circumference, is called the circle's boundary. The area of a circle determines the space it takes up. A circle's diameter is equal to the length of a straight line traced through its center. Usually, it is stated in terms of units like cm or m.

Given data -

Perimeter of circular plate = 10 $\pi$ cm

We know that perimeter of a circle is 2 $\pi$ r

Therefore 10 $\pi$ = 2 $\pi$ r

r = 5 cm

The given error Alan can make is +-1 cm.

Minimum radius is given by

2 $\pi$ r = 10 $\pi$ - 1

r = $\frac{10\pi - 1 }{2\pi }$

r = 5 - $\frac{1}{2\pi }$

Maximum radius is given by

2 $\pi$ r = 10 $\pi$ + 1

r = $\frac{10\pi + 1 }{2\pi }$

r = 5 + $\frac{1}{2\pi }$

The ideal radius Alan must control is $\frac{1}{2\pi }$ cm.

To know more about perimeter of circle, visit:

brainly.com/question/2718232

#SPJ1

5 0

1 year ago

Brian invests £1500 into his bank account. He receives 2% per year simple interest. How much will Brian have after 3 years? Give

Jet001 [13]

Answer:

1590

Step-by-step explanation:

1500 x 0.02

= 30

30 x 3

= 90

1500+90 = 1590

(ps.. there was an equation for this i just forgot it, you can look it up and check it)

8 0

3 years ago