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3 years ago

If the atomic number of an element is 7 and its mass number is 16, how many neutrons are in the atom's nucleus

Mathematics

1 answer:

Margaret [11]3 years ago

7 0

Number of Neutrons = Atomic mass - Atomic number
= 16 - 7 = 9

In short, Your Answer would be 9

Hope this helps!

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What is 33 1/3 of 12?

worty [1.4K]

It is around 400, if u see the world “of” is usually means multiply :)

6 0

3 years ago

Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

c) We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$

Part a

We want this probability:

$P(X$

And for this case we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a} = \frac{x-0}{20-0}= \frac{x}{20}$

And using the cumulative distribution function we got:

$P(X$

For the probability $P(X>14)$ if we use the cumulative distribution function and the complement rule we got:

$P(X>14) = 1-P(X$

Part b

We want this probability:

$P(7< X$

And using the cdf we got:

$P(7< X$

Part c

We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

3 0

2 years ago

WILL MAKE BRAINLIEST <br><br> find the slope of each line

MaRussiya [10]

Answer:

1) 7/3

2) Undefined

3) 1

4) 7/4

Step-by-step explanation:

5 0

2 years ago

What is the solution for x in the equation<br> -4+5x-7=Okay 0+3x-2x

Maksim231197 [3]

Answer:

X = 2.75 or 2 3/4 in fraction form

Step-by-step explanation:

We know that the variable X has to make both equations equal.

It is really just crossing out the options.

2.75 can fit in the X variable because if 2.75 was in both equations, the answer would be the same.

So the answer is 2.75

Hope this helps! :)

૮ ・ﻌ・ა

5 0

2 years ago

The cost in dollars, y, of a large pizza with x toppings from Pat’s Pizzeria can be modeled by a linear function. A large pizza

andre [41]

22.75, that what I got

3 0

2 years ago

Read 2 more answers