Answer:
6.397 × 10^9
Step-by-step explanation:
9 9 2
1 6
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5 9 5 2
9 9 2
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1 5,8 7 2 <==
Hold up ! Hee haw ! Whoa !
There is no such unit as "kilowatts per hour". I see it printed
right there on the sheet that somebody gave you, and it's as
wrong as it can be. The unit called the "watt" ... and all of its
multiples, like the milliwatt, microwatt, nanowatt, kilowatt, megawatt,
gigawatt, etc. ... are all rates of energy flow. The "per hour" is built
into them. 1 watt = 1 joule of energy per second. Glueing another
"per second" or "per hour" onto any quantity of watts makes it
meaningless, useless, misleading, and unhelpful. If you hadn't
attached a picture of that printed sheet, I would have thought that
you copied the problem wrong. But seeing that sheet, I'm worried
about what they're handing you in school. This one is misleading
and wrong. The more you try to understand it, the more damage
it'll do to your understanding of Physics.
The energy consumption of an appliance is measured in
kilowatt-hours, and is the product of the kilowatts the appliance
uses and the number of hours it uses energy.
The Siri family's clothes dryer uses energy at the rate of
2-1/2 kilowatts when it's running. If Mr. Soto sneaks into
the Siri family's house and runs their dryer for 3/4 hour,
it'll use
(2-1/2 kilowatts) x (3/4 hour)
= (2-1/2 x 3/4) (kilowatt-hour)
= 1.875 kilowatt-hours of energy .
Answer:
A. A stratified random sample is a combination of simple random samples selected from each of several strata.
Step-by-step explanation:
In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.
There are various types of sampling used by researchers and these are;
1. Random sampling.
2. Convenience sampling.
3. Systematic sampling.
4. Cluster sampling.
5. Stratified sampling.
Stratified random sampling can be defined as a method of sampling that involves dividing a population into smaller groups known as strata.
In stratified random sampling, the strata are formed based on member's shared characteristics (e.g female or male, occupation, education) or attribute (e.g black or white).
<em>Hence, the statement about stratified random sampling which is true is that, a stratified random sample is a combination of simple random samples selected from each of several strata. </em>
Measure of its each edge =
Height of each lateral surface (or slant height) =
- Surface area of the given square pyramid.
Surface Area of square pyramid =
Where,
Surface Area of square pyramid = (putting the value of , a and l)
Therefore, surface area of the given square pyramid
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Hope it helps you:)