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GalinKa [24]
3 years ago
13

Clearview Window Cleaners washes 20 office windows in 168 minutes.How many hours is that?

Mathematics
1 answer:
bezimeni [28]3 years ago
7 0
1 : 8.4 min
1 : 7.14 every hour
So they wash 7 windows every hour
You might be interested in
Riley buys office equipment with a total price of $6,280 for her new company. If the office equipment depreciates at a rate of 1
alexdok [17]

Answer: y = 6280(0.87)^x

Step-by-step explanation:

If the office equipment depreciates at a rate of 13% each year, then the rate of depreciation is exponential.

We would apply the formula for exponential decay which is expressed as

y = b(1 - r)^x

Where

y represents the value of the office equipment after t years.

x represents the number of years.

b represents the initial value of the office equipment.

r represents rate of decay.

From the information given,

y = $628

r = 13% = 13/100 = 0.13

Therefore, the equation that represents the value of the equipment after x years is

y = 6280(1 - 0.13)^x

y = 6280(0.87)^x

4 0
3 years ago
There are 16 seagulls at 1 pm on the beach. By 3 pm, there were 40 seagulls. What is the constant rate of change?
My name is Ann [436]
For every one hour 12 seaguls show up
12 seaguls for every one hour
the answer i think is 12 seaguls per hour
3 0
3 years ago
Find the number one-third of the way from 1/6 to 4/5.
masya89 [10]
I got u with this it really easy
3 0
3 years ago
12.4. Measure of Dispersion<br>2076 Q.No. 15 Find the standard deviation of: 4, 6, 8, 10, 12.​
Alenkinab [10]

Answer:

Standard deviation of given data = 3.16227

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given sample size 'n' = 5

Given data  4, 6,8,10,12

Mean = \frac{4+6+8+10+12}{5} = 8

Mean of the sample x⁻ = 8

Standard deviation of the sample

                  S.D = \sqrt{\frac{Sum(x-x^{-} )^{2} }{n-1}}

<u><em>Step(ii)</em></u>:-

Given data

x          :         4      6       8       10      12

x-x⁻      :      4 - 8   6-8   8-8    10-8    12-8

(x-x⁻)   :        -4      -2     0          2        4

(x-x⁻)²  :        16     4       0         4        16  

 

  S.D = \sqrt{\frac{Sum(x-x^{-} )^{2} }{n-1}}

  S.D = \sqrt{\frac{16+4+0+4+16}{4}}

 S.D = √10 = 3.16227

<u><em> Final answer</em></u>:-

The standard deviation = 3.16227

8 0
2 years ago
Fresh Express
kolbaska11 [484]

Answer: £245

Step-by-step explanation:

24.5 hours from wednesday to saturday

24.5 X 10 = 245

4 0
3 years ago
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