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3 years ago

Evan said that the difference between two negative numbers must be negative. Was he right?

1 answer:

8 0

No
lets say a and b are positive numbers
that means -a and -b are negative
if you make the difference between these to it'd be
-a-(-b) which means -a+b, and if b>a then the difference is positive

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Please help i will give out brainliest

Aleksandr-060686 [28]

Answer:

a. L.B. = 20.5

b. U.B. = 21.5

Step-by-step explanation:

Length is measured 21 cm correct to 2 significant figures

a. Lower bound of 21

= 20.5 < 21

= 20.5

b. Upper bound of 21

= 21 < 21.5

= 21.5

4 0

3 years ago

Assume that women's heights are normally distributed with a mean given by mu equals 62.5 in, and a standard deviation given by

kirza4 [7]

Answer: a) The probability is approximately = 0.5793

b) The probability is approximately=0.8810

Step-by-step explanation:

Given : Mean : $\mu= 62.5\text{ in}$

Standard deviation : $\sigma = \text{2.5 in}$

a) The formula for z -score :

$z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

Sample size = 1

For x= 63 in. ,

$z=\dfrac{63-62.5}{\dfrac{2.5}{\sqrt{1}}}=0.2$

The p-value = $P(z$

$0.5792597\approx0.5793$

Thus, the probability is approximately = 0.5793

b) Sample size = 35

For x= 63 ,

$z=\dfrac{63-62.5}{\dfrac{2.5}{\sqrt{35}}}\approx1.18$

The p-value = $P(z$

$= 0.8809999\approx0.8810$

Thus , the probability is approximately=0.8810.

6 0

3 years ago

Find the surface area of the attached figure

erastova [34]

Answer:

$1477.033\\$

Step-by-step explanation:

4 0

3 years ago

{f(1)=15<br><br> f(n)=f(n-1)•n

zheka24 [161]

I solved the second equation and it’s zero, I’m not really sure how to help with the top on tho. I am really sorry :/

5 0

3 years ago

Read 2 more answers

I have 3 different ones now. I apologize for the relentless questions.

Minchanka [31]

Answer:

$\frac{1}{4x}$

Step-by-step explanation:

The negative exponential can be represented with the help of fractions. By this way, we also make the negative exponential disappear. For example, we can write:

$a^{-1} = \frac{1}{a}$

The explanation is this:

Since $a^{0}=1, \frac{1}{a}=\frac{a^{0} }{a^{1} } = a^{0-1} =a^{-1}$

According to this definition, we can simplify our problem in the following way:

$(4x)^{-1} = \frac{1}{(4x)^{1} } = \frac{1}{4x}$

5 0

3 years ago