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4 years ago

2nd out of 10 questions

Mathematics

2 answers:

Fudgin [204]4 years ago

6 0

Assuming we're after the exact answer, we can just worry about the fractional parts

$0.2 \times 0.3 \times 0.6 = 0.06 \times .6 = 0.036$

Three decimal places, second choice

Lapatulllka [165]4 years ago

3 0

The multiplication will have a result with a number of decimal places equal to the sum of the numbers of decimal places in the factors: 1 + 1 + 1 = 3.

... 4.2 × 12.3 × 14.6 = 754.236

However, since this is a cost, it will be rounded to 2 decimal places.

The cost will be $754.24. . . . . . Paul's final answer

_____

Of the choices offered, the best one is

... three

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100 points!!! PLEASE ANSWER IT HOW I HAVE IT IN ORDER!!

Anvisha [2.4K]

Answer: Have a good day. I’m sorry you have to go through this, my head already hurts and I am just lōoking at it.

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3 years ago

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A man drove his car a distance of 260 miles in 4 hours. If continuing at this rate is possible, he will travel ____ miles in 8 h

spayn [35]

Answer:

520 miles

Step-by-step explanation:

since 4 is half of 8, you just multiply 260 by 2.

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3 years ago

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A student on a piano stool rotates freely with an angular speed of 2.85 rev/s . The student holds a 1.50 kg mass in each outstre

Vlad1618 [11]

Answer:r'=0.327 m

Step-by-step explanation:

Given

$N=2.85 rev/s$

angular velocity $\omega =2\pi N=17.90 rad/s$

mass of objects $m=1.5 kg$

distance of objects from stool $r_1=0.789 m$

Combined moment of inertia of stool and student $=5.53 kg.m^2$

Now student pull off his hands so as to increase its speed to 3.60 rev/s

$\omega _2=2\pi N_2$

$\omega _2=2\pi 3.6=22.62 rad/s$

Initial moment of inertia of two masses $I_0=2mr_^2$

$I_0=2\times 1.5\times (0.789)^2=1.867$

After Pulling off hands so that r' is the distance of masses from stool

$I_0'=2\times 1.5\times (r')^2$

Conserving angular momentum

$I_1\omega =I_2\omega _2$

$(5.53+1.867)\cdot 17.90=(5.53+I_o')\cdot 22.62$

$I_0'=1.397\times 0.791$

$I_0'=5.851$

$5.53+2\times 1.5\times (r')^2=5.851$

$2\times 1.5\times (r')^2=0.321$

$r'^2=0.107009$

$r'=0.327 m$

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3 years ago

A physical trainer decides to collect data to see if people are actually weight changing weight during the shelter in place. He

telo118 [61]

Answer:

H0: µd = 0 (claim)

H1: µd ≠ 0

This is a two-tail t-test for µd

Step-by-step explanation:

This is a paired (dependent) sample test, with its hypothesis is written as :

H0: µd = 0

H1: µd ≠ 0

From the equality sign used in the hypothesis declaration, a not equal to ≠ sign in the alternative hypothesis is used for a two tailed t test

The data isn't attached, however bce the test statistic cannot be obtained. However, the test statistic formular for a paired sample is given as :

T = dbar / (Sd/√n)

dbar = mean of the difference ; Sd = standard deviation of the difference.

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3 years ago

PLZ HELP ILL GIVE BRAINLEST FOR RIGHT ANSWER AND PLS EXPLAIN TOO

UNO [17]

Answer:

166

Step-by-step explanation:

A=2(wl+hl+hw)=2·(4·5+7·5+7·4)=166

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3 years ago