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Sergeeva-Olga [200]
3 years ago
11

18 boxes of nails weight equally 49/1/2/ how much does each box weight

SAT
1 answer:
Nata [24]3 years ago
7 0
18 boxes of nails weighs 49.5 kg
So one box weighs 49.5/18=2.75 kg

Therefore each box weighs 2.75 kg
That means each box weighs 2 wholes and 3 by 4
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Suppose that IQ scores have a bell-shaped distribution with a mean of 101 and a standard deviation of 12. Using the empirical ru
7nadin3 [17]

95.44% IQ scores are between 77 and 125

We're given,

Mean (a)=101

standard deviation (b)=12

To find : P[77 < x < 125]

Using Empirical Rule:

∴ P[77 < x < 125]  = P[\frac{77-101}{12} < \frac{x-a}{b} < \frac{125-101}{12}]\\

=P[-2 < z < 2]\\

=P[Z < 2]-P[Z < -2]\\

=0.9772-0.0228\\

=0.9544 =95.44% (approx)

Learn more about Empirical rule of IQ calculation here:

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1 year ago
A work-study student receives a paycheck from: O A. FAFSA. O B. the U.S. Department of Education. O C. his or her employer. O D.
julsineya [31]

Answer:d

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5 0
3 years ago
In addition to gold and silver, what did the london company hope to find at jamestown? new crops and products the northwest pass
Galina-37 [17]

Answer:

The correct answer of the given question above would be THE NORTHWEST PASSAGE. London Company hoped to find at Jamestown in addition to gold and silver, is the Northwest Passage. The Northwest Passage is a sea route that links the Northern Atlantic and Pacific Oceans through the Arctic Ocean.

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1 year ago
Once a psychoactive drug enters the brain, it acts on one or more neurotransmitters
andreyandreev [35.5K]

Psychoactive substances influence the function and interaction of one or more neurotransmitters in the brain. Depending on the type, dose, and combination of medications used as well as the individual's qualities, expectations, and environment, this can have a variety of consequences on the user's mental and physical health.

<h3>What is a psychoactive drug?</h3>

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Psychoactive medications act on one or more neurotransmitters. The neuron sending the signal, the presynaptic neuron, releases neurotransmitters, which then bind to receptors on the postsynaptic neuron.

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3 0
1 year ago
suppose you push a hockey puck of mass m across frictionless ice for a time 1.0 s, starting from rest, giving the puck speed v a
saul85 [17]

Answer: Twice the previous time would be taken to reach the same speed v with the puck of mass 2m.

Explanation:

Let a Force pushes the hockey puck of mass m.

Then acceleration, a= \frac{F}{m}a=mF

From the equation of motion,

\begin{gathered}\➪ v=u+at\\ v=0+\frac{F}{m}\Delta t\end{gathered}⇒v=u+atv=0+mFΔt ......(1)

In the second case, when mass is 2m, then acceleration,

a'=\frac{F}{2m}a′=2mF

and t' is the time taken.

The final speed is v,

\begin{gathered}\➪ v=0+ a't'\\ \➪ \frac {F}{m}\Delta t=\frac{F}{2m}t'\\ \➪ t'= 2\Delta t\end{gathered}⇒v=0+a′t′⇒mFΔt=2mFt′⇒t′=2Δt using equation (1)

Hence, it would take two times the previous amount of time to push the pluck of double mass.

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3 0
2 years ago
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