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2 years ago

80 miles per hour is how many feet per minute?

1 answer:

8 0

Keeping in mind that, there are 5280 feet in 1 mile and 60 minutes in 1 hour.

$\bf \cfrac{80~\underline{mile}}{\underline{hr}}\cdot \cfrac{5280~feet}{\underline{mile}}\cdot \cfrac{\underline{hr}}{60~min}\implies \cfrac{80\cdot 5280~feet}{60~min}\implies \cfrac{422400~feet}{60~min}
\\\\\\
7040\frac{feet}{min}$

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Help me please asap

abruzzese [7]

Answer:

So the right answer is none

Step-by-step explanation:

-6≤1+3x

3x≥-7

x≥-2,33

-2,33>-5>-6>-11

so none of those are bigger then -2,33 and x is bigger then -2,33

3 0

2 years ago

The weights of adult male birds of a certain species are normally distributed with a mean of 27.5 grams and a standard deviation

Korvikt [17]

Answer:

The z-score of a male bird of this species with a weight of 29.37 grams is 1.7.

Step-by-step explanation:

We are given that the weights of adult male birds of a certain species are normally distributed with a mean of 27.5 grams and a standard deviation of 1.1 grams.

Let X = weights of adult male birds of a certain species

So, X ~ Normal( $\mu=27.5,\sigma^{2} =1.1^{2}$ )

The z score probability distribution for normal distribution is given by;

Z = $\frac{ X-\mu}{\sigma } }$ ~ N(0,1)

where, $\mu$ = population mean weight = 27.5 grams

$\sigma$ = standard deviation = 1.1 grams

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

SO, the z-score of a male bird of this species with a weight of 29.37 grams is given by;

Z score = $\frac{ X-\mu}{\sigma } }$ = $\frac{ 29.37-27.5}{1.1 } }$

= 1.7

4 0

2 years ago

P=q+2 2p+3q=-26 help

kompoz [17]

All you have to do is plug and solve...

2(q+2) + 3q = -26
2q + 4 + 3q = -26

Subtract 4 from the left side and move it to the right...

2q + 4 + 3q = -26
- 4 - 04
_________________
2q + 3q = -30

Now add 3q and 2q together and you get 5q, next divide...

5q = -30
_______
5 5

Finally, you get q equal to negative 6 (-6)!

3 0

2 years ago

Read 2 more answers

Identify the class width, class midpoints, and class boundaries for the given frequency distribution.

Crank

Answer:

a. Class width=4

Class midpoints

46.5

50.5

54.5

58.5

62.5

66.5

70.5

Class boundaries

44.5-48.5

48.5-52.5

52.5-56.5

57.5-60.5

60.5-64.5

64.5-68.5

68.5-72.5

Step-by-step explanation:

There are total 7 classes in the given frequency distribution. By arranging the frequency distribution into the refine form we get,

Class

Interval frequency

45-48 1

49-52 3

53-56 5

57-60 11

61-64 7

65-68 7

69-72 1

Class width is calculated by taking difference of consecutive two upper class limits or two lower class limits.

Class width=49-45=4

The midpoints of each class is calculated by taking average of upper class limit and lower class limit for each class.

$M=\frac{lower class limit+upper class limit}{2}$

Class

Interval Midpoints

45-48 $\frac{45+48}{2}=46.5$

49-52 $\frac{49+52}{2}=50.5$

53-56 $\frac{53+56}{2}=54.5$

57-60 $\frac{57+60}{2}=58.5$

61-64 $\frac{61+64}{2}=62.5$

65-68 $\frac{65+68}{2}=66.5$

69-72 $\frac{69+72}{2}=70.5$

Class boundaries are calculated by subtracting 0.5 from the lower class limit and adding 0.5 to the upper class interval.

Class

Interval Class boundary

45-48 44.5-48.5

49-52 48.5-52.5

53-56 52.5-56.5

57-60 56.5-60.5

61-64 60.5-64.5

65-68 64.5-68.5

69-72 68.5-72.5

7 0

2 years ago

The Merrillville Police Department wants to know the

Nuetrik [128]

The answer should be number two

7 0

1 year ago