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4 years ago

Help PLEASE!

Mathematics

1 answer:

pav-90 [236]4 years ago

5 0

It would be equivalent to 18099

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The amount of time t it takes for a group of volunteers to clean up a park varies inversely with the number of volunteers v. If

sweet-ann [11.9K]

T ∝ 1/v

so, t = k/v or tv = k 

Then, with t = 2.5 and v = 5 we have: 

2.5 = k/5 

so, k = 12.5 

Therefore, t = 12.5/v or vt = 12.5 HOPE IT HELPED

4 0

3 years ago

Read 2 more answers

A set of electric toothbrush prices are normally distributed with a mean of 87 dollars and a standard deviation of

Studentka2010 [4]

Answer:

The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars is 0.0099

Step-by-step explanation:

A set of electric toothbrush prices are normally distributed with a mean of 87 dollars and a standard deviation of 8 dollars.

$Mean = \mu = 87$

Standard deviation = $\sigma = 8$

We are supposed to find proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars i.e.P(104.60<x<108.20)

$Z=\frac{x-\mu}{\sigma}$

At x = 104.60

$Z=\frac{104.60-87}{8}$

Z= 2.2

At x=108.20

$Z=\frac{108.20-87}{8}$

Z= 2.65

Refer the z table for p value :

P(x<108.20)-P(x<104.60)=P(Z<2.65)-P(Z<2.2)=0.9960-0.9861=0.0099

Hence The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars is 0.0099

4 0

3 years ago

Which equation BEST represents the line of best fit for the scatterplot?

velikii [3]

Y=2x+2 describe the best fit.

first find x and y intercept of a line
x intercept where y=0 is x=-1 and y intercept where x=0 is y=2

6 0

3 years ago

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Which choice best describes the angles st

Aleks04 [339]

Supplementary because the add to 180°

8 0

3 years ago

The value of polynomial 5x-4x^2+3, when x=-1

Alchen [17]

Answer:

-6

Step-by-step explanation:

$\text{Given that,}\\\\5x-4x^2 +3 \\\\\text{When}~ x = -1,\\\\~~~5(-1) -4(-1)^2 +3 \\\\=-5-4(1)+3\\\\=-5-4+3\\\\=-5-1\\\\=-6$

8 0

2 years ago