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2 years ago

30 points! This table shows how long it took five students to complete their science projects.

Mathematics

1 answer:

torisob [31]2 years ago

8 0

Answer:

the mean

Step-by-step explanation:

mean is calculated average

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Need help ASAP !! Select true or false for each statement

anygoal [31]

Answer:

true

false

true I think don't hold me on it

3 0

3 years ago

Read 2 more answers

if the kinetic energy of an aeroplane moving at a velocity of 100m/s is 200j ,what is the mass of the aeroplane

Black_prince [1.1K]

Answer:

0.04kg

Step-by-step explanation:

Kinetic energy Formula: eK=0.5×m×v²

to work out mass

we can rearrange the formula and make it:

~m=eK÷(0.5×v²)

now insert the missing digits into the formula:

m=200÷(0.5×100²)

work it out, and you get your answer

m=0.04kg

Hopefully this helped-have a good day)

8 0

2 years ago

Which of the following values are solutions to the inequality 1+5x<4? I.6 II.5 III.2

Paraphin [41]

Answer:

x < .6

Step-by-step explanation:

1+5x<4

Subtract 1 from each side

1-1+5x<4-1

5x<3

Divide each side by 5

5x/5 <3/5

x < .6

4 0

3 years ago

What is the volume of a hemisphere with a radius of 26.7 m, rounded to the nearest tenth of a cubic meter?

attashe74 [19]

Answer:

$39,865.1m^3$

Step-by-step explanation:

a hemisphere is half a sphere.

And if the formula for the volume of a sphere is:

$V=\frac{4\pi r^3}{3}$

we must calculate the volume of the sphere and in the end divide by two to find the volume of the hemisphere.

Since the radius is:

$r=26.7m$

substituting this into the formula for volume:

$V=\frac{4\pi (26.7m)^3}{3} \\\\V=\frac{4(3.1416)(19,034.163m^3)}{3} \\\\V=79,730.12m^3$

this is the volume of the total sphere, thus the volume of a hemisphere is:

$\frac{V}{2}=\frac{79,730.12m^3}{2}\\ =39,865.06m^3$

rounding to the nearest tenth:

$39,865.1m^3$

8 0

3 years ago

Read 2 more answers

YU HAVE 1 CASE OF SOAP BARS AND THERE ARE 150 BARS IN A CASE..YU USE 300 BARS OF SOAP PER DAY. HOW MANY CASES DO YOU NEED TO HAV

Fittoniya [83]

If you need 300 bars per day, you need 2 cases per day (2*150 = 300).

Therefore you need 2*7 = 14 cases per week

You can subtract the case you already have leaving you with 13 cases needed

3 0

3 years ago