8.25x= 15 so....
15/8.25=x so....
1.81~=x so....
To the nearest dollar it 2$/lb
The cost of electricity consumed by the TV per month is <u>$4.968</u>.
In the question, we are given that a TV set consumes 120W of electric power when switched on. It is kept on for a daily average of 6 hours per day. The number of days in the month is given to be 30 days. The cost per unit of electricity is 23 cents per kWh.
We are asked to find the cost of electricity the TV consumes in the month.
The daily energy consumed by the TV = Power*Daily time = 120*6 Wh = 720 Wh.
The monthly energy consumed by the TV = Daily energy*Number of days in the month = 720*30 Wh = 21600 Wh = 21600/1000 kWh = 21.6 kWh.
Hence, the total cost of electricity the TV consumes = Monthly energy*Per unit cost = 21.6*23 cents = 496.8 cents = $496.8/100 = $4.968.
Therefore, the cost of electricity consumed by the TV per month is <u>$4.968</u>.
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Answer:
A. $4,960
B. 8%
C. $120
Step-by-step explanation:
<u>Part A</u>
The amount in the account at the end of 3 years is the original amount ($4000) plus the earned interest ($960). That sum will be ...
$4,000 + 960 = $4,960 . . . account balance
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<u>Part B</u>
The amount of interest is computed using the formula ...
I = Prt
where I is the interest earned, P is the principal invested, r is the annual rate, and t is the number of years. Putting the given values into this equation, we can solve for r:
960 = 4000·r·3
960/12000 = r = 0.08 = 8%
The interest rate was 8%.
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<u>Part C</u>
The additional interest can be computed using the same formula as for part B.
I = Prt
I = 4000·0.01·3 = 120
The additional interest earned at a 1% higher rate would be $120.
Answers:
angle x= E. 118°
angle m= 131°
explanation:
the sum of the four angles of any quadrilateral
is 360
Formula for standard deviation sample calculation is:
SD = sqrt (( ∑( x - m)²) / ( n - 1 )),
where x stays for each value in the data set, m stays for mean of all values in the data set, and n stays for the number of values in the data set.
For example: Find the sample standard deviation for the set of numbers: 10, 11, 11, 12, 12.
First we will find mean of all avlues: m = ( 10 + 11 + 11 + 12 +12 ) / 5 = 11.2
SD = sqrt (( 1.2² + 0.2² + 0.2² + 0.8² + 0.8² ) / ( 5 - 1 ))=
= sqrt ( 2.8 / 4 ) = √0.7 = 0.837
