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3 years ago

How can you quickly calculate 20 percent of any bill amount?

1 answer:

4 0

There are several ways in solving quick the 20% of any bill. One of those ways is by getting first the 10% of the amount then will later on be multiplied by two. Another one is by simply dividing the total bill amount by 5, which also 20% of the total bill amount. Hope this helps.

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Describe the difference between the calculation of population standard deviation and that of sample standard deviation.

taurus [48]

Answer:

View graph

Step-by-step explanation:

The population refers to the whole set under study, while the sample is a representative part of that population.

3 0

3 years ago

A family deposited $8000 into an account six years ago. The account earned

nataly862011 [7]

Use I = prt

1200 = 8000r(1)

1200/8000 = r

0.15 = r

15% = r

3 0

3 years ago

Read 2 more answers

Determine the area of a square with side length 2√7 in.

Ainat [17]

Answer:

28 inch

Step-by-step explanation:

The length of all four sides of square is equal.

The formula used for finding the area of square is:

Area = (Length) × (Length)

Thus, the Area of square whose length is 2√7 is:

Area = 2√7 × 2√7

⇒ Area = 4 × 7 = 28 inch.

3 0

3 years ago

. How are the formulas for the circumference of a circle and area of a circle derived?

kakasveta [241]

They can be derived by using calculus(integration to be precise)

$\pi$ $= \frac{circumference }{diameter}$ (its how pi is defined)
so that gives circumference

to get area , you use integration $of an elemental ring of radius r and thickness dr and integrate it$ $A= \int\limits^0_r {2 \pi r} \, dr$

that gives the area.

if you don't know calculus yet ,dont worry, just remember the formulae.

5 0

4 years ago

23 pls help, it’s so weird I can’t find a pattern... and I am lazy pls and thx

Illusion [34]

I think the pattern is
++_0_--
i.e positive twice neutral negative twice
2010
0.00 and 2012
-0.45

8 0

4 years ago