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monitta
3 years ago
14

Explain how you can tell when a formula represents a length an area or a volume

Mathematics
2 answers:
AlekseyPX3 years ago
7 0
Do you mean how you can tell between an area formula and a volume formula? Well usually like on a reference sheet it says the shape and the letter a or v, a representing area and v representing volume. I hope this helps, if it doesn't please tell me in the comment section
MatroZZZ [7]3 years ago
7 0

<span>C = 2pi*r, the r represents a length
A = pi*r^2 the r^2 represents a product of length*length which is area
V = (4/3)pi*r^3 the r^3 represents a product of length*length*length which is volume, a sphere</span>

( this is for a circle)

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What is 2 1/2 /1/3 ?
DanielleElmas [232]

Answer:

15/2

Step-by-step explanation:

My interpretation of your math expression is "2  1/2 divided by 1/3."

I prefer to write this as:

 5        1

----- ÷ -----

 2         3

which is equivalent to:

 5        3

----- * ----- = 15/2

 2        1

5 0
3 years ago
A company claims that less than 10% of adults own a smart watch. You want to test this claim, and you find that in a random samp
Nezavi [6.7K]

Answer:

Test statistic is 0.67

Critical value is -2.33

Step-by-step explanation:

Consider the provided information.

The formula for testing a proportion is based on the z statistic.

z=\frac{\hat p-p_0}{\sqrt{p_0\frac{1-p_0}{n}}}

Were \hat p is sample proportion.

p_0 hypothesized proportion and n is the smaple space,

Random sample of 100 adults, 12% say that they own a smart watch.

A company claims that less than 10% of adults own a smart watch.

Therefore, n = 100  \hat p = 0.12 , P_0 = 0.10

1 - P_0 = 1 - 0.10 = 0.90

Substitute the respective values in the above formula.

z=\frac{0.12-0.10}{\sqrt{0.10\frac{0.90}{100}}}

z\approx 0.67

Hence, test statistic = 0.67

This is the left tailed test.

Now using the table the P value is:

P(z < 0.667) = 0.7476

P-value = 0.7476

\alpha = 0.01

Here,  P-value > α therefore, we are fail to reject the null hypothesis.

Z_{\alpha}= Z_{0.01} = -2.33

Hence, Critical value is -2.33

7 0
3 years ago
Can u plz help with thid
Mila [183]
A , because you have to divide it so you can get the correct answer
6 0
3 years ago
Read 2 more answers
I need help solving this​
castortr0y [4]
The answer would be 108 ft^2
3 0
2 years ago
Find the cotangent of the angle in standard position in which the terminal side passes through the point (6, 8).
krok68 [10]
Cotangent  = adjacent / opposite =  x / y  = 6/8  = 3/4

Answer 3/4
3 0
3 years ago
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