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2 years ago

What is the scientific notation of 0.0121

Mathematics

1 answer:

jek_recluse [69]2 years ago

6 0

You move to the right, so the exponent is gonna be negative.
1.21 * 10-²

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Abdullah is a quality control expert at a factory that paints car parts. He knows that 20\ , percent of parts have an error in t

-Dominant- [34]

The error rate has decreased after changing the painting process.

<u>Step-by-step explanation:</u>

Abdulla knows that 20 percent of the parts have an error in their painting. After suggesting changes in painting process, he wants to know whether the error rate has changed.

Number of parts in the random sample=400400400

Number of parts that had an error=606060

We have to determine what percentage of 400400400 is 606060

$606060=x/100 \times 400400400\\=0.15%$

After changing the painting process 0.15% of parts have error.

The previous percentage was 20.Hence the error rate has clearly changed.

3 0

2 years ago

Consider a data set with at least three data values. Suppose the highest value is increased by 10 and the lowest is decreased by

bulgar [2K]

Answer:

a. Mean doesn't change.

b. Median doesn't change.

c. Mode can change.

Step-by-step explanation:

Let us assume the data set with 10 observations

{2,6,4,3,2,6,4,9,4,7}.

Arranging data set in ascending order

{2,2,3,4,4,4,6,6,7,9}

mean=2+2+3+4+4+4+6+6+7+9/10=4.7

median

n/2=10/2=5 is an integer so,

median= average of n/2 and n/2 +1

median= (5th value+6th value)/2

median=(4+4)/2=8/2=4

Mode

The most repeated value is 4. So, mode is 4 for assumed data.

Increasing highest value by 10 and decreasing lowest value by 10

{-8,2,3,4,4,4,6,6,7,19}

mean=-8+2+3+4+4+4+6+6+7+19/10=4.7

Mean doesn't change

median

n/2=10/2=5 is an integer so,

median= average of n/2 and n/2 +1

median= (5th value+6th value)/2

median=(4+4)/2=8/2=4

Median doesn't change

Most occurring value is still 4. But mode can change if the value the highest value becomes most concurring value.

5 0

2 years ago

Read 2 more answers

Carlos read 4 books.How many children read fewer books than carlos

sashaice [31]

How many children are there in all?

6 0

2 years ago

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a kilogram of dalandan in pure gold costs P55. if jessica bought k kilograms, represent the amount paid A as a function

Rufina [12.5K]

Answer:

$A(k) = 55k$

Step-by-step explanation:

Given

$1kg = P55$

Required

Determine the cost of k kilogram

$1kg = P55$

Multiply both sides by k

$k * 1kg = P55 * k$

$k\ kg = 55 k$

Representing this as a function:

$A(k) = 55k$

8 0

2 years ago

Find the local maximum and minimum values and saddle point(s) of the function. If you have three-dimensional graphing software,

grandymaker [24]

Solution:

There is no saddle point (DNE). However, there is local maximum at (1, 1/2) for the given function.

Explanation:

we have function of two variables f(x,y)= 9-2x+4y-x^2-4y^2

we will find the values by partial derivative with respect to x,y,xy

$f_{x}$ = -2 -2x

$f_{y}$ = 4 -8y

to find the saddle point we should first find the critical points so equate

-2 -2x=0 and 4 -8y=0

we get x= 1 and y =1/2 so, critical points are (1,1/2)

to find local maximum or minimum we have to find $f_{xx}$ , $f_{yy}$ and $f_{xy}$

formula is $f_{xx}$ * $f_{yy}$ - $f^{2_{xy} }$ =0

$f_{xx}$ = -2

$f_{yy}$ = -8

$f^{2_{xy} }$ =0

putting values in formula

(-2)*(-8) -0 =16 > 0, and $f_{xx}$ < 0 and $f_{yy}$ <0

so, here we have local maximum

we have no saddle point for this function by using the same formula we used to find extrema.

4 0

2 years ago

Read 2 more answers