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deff fn [24]
3 years ago
11

??? Help plz!!!!!!!!!!

Mathematics
2 answers:
marusya05 [52]3 years ago
5 0

Answer:

I'm so sorry

Step-by-step explanation:

you have to re-enter in another format we can't all see the pictures

ASHA 777 [7]3 years ago
3 0

Answer:

runner 3

Step-by-step explanation:

Runner #1 runs 1 mile in 10 minutes

Runner #2 runs 1 mile in 12 minutes

Runner #3 runs 1 mile in 9.5 minutes

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4. The amount of money in Dave's checking account for the first week of
Ahat [919]

Answer: Mean- 547.3

Median- 575

Mode-no mode

range-550

Step-by-step explanation:

mode is the number that occurs the most

mean- add up all the numbers and divide them by them number of ad ins

range- largest number- smallest number

median- middle number

6 0
2 years ago
2. A random sample of 30 households was selected as part of a study on electricity usage, and the number of kilowatt-hours (kWh)
Brrunno [24]

Answer:

Step-by-step explanation:

Given that n =30, x bar = 375 and sigma = 81

Normal distribution is assumed and population std dev is known

Hence z critical values can be used.

For 95% Z critical=1.96

Margin of error = 1.96(\frac{81}{\sqrt{30} } )=29

Confidence interval = 375±29

=(346,404)

B) 99% confidence

Margin of error = 2.59*Std error =38

Confidence interval = 375±38

=(337, 413)

C) For 90%

Margin of error = 20

Std error = 20/1.645 = 12.158

Sample size

n=(\frac{81}{12.158} )^2\\=44.38

Atleast 44 people should be sample size.

8 0
3 years ago
Find the slope of the line that goes through (0, 2) and (4, −2).
zmey [24]
M = (y2 - y1) / (x2 - x1) 

m = (-2 - 2) / (4 - 0) 

m = -4 / 4

m = -1 

The slope of the line that goes through (0, 2) and (4, -2) is -1. 
5 0
3 years ago
Read 2 more answers
Is 1.32 a rational number or integer
Ivahew [28]

Answer:

A rational number.

Step-by-step explanation

A rational number is a ratio of whole numbers.

1/3 is the ratio of 1:3

3:1 becomes 3/1 = 3

32:10 can be written 32/10 or 16/5 or 3.2

16/5 is a rational number 16 and 5 are integers, 5 is not equal to 0.

Therefore, 3.2 which can be expressed as 16/5 is a rational number.

6 0
3 years ago
Karen spent all but $8 of her savings in three stores. In each store she spent $2 less than half of what she had when she went i
maksim [4K]

Answer:

36 dollars

Step-by-step explanation:

We need to think backwards to solve this question.

(8 - 2) x 2 = 12

(12 - 2) x 2 = 20

(20 - 2) x 2 = 36

5 0
2 years ago
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