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3 years ago

A sample of carbon has a mass of 0.000000000000000000034 kg. Express this mass in scientific notation.

Mathematics

2 answers:

BigorU [14]3 years ago

8 0

Answer:

I don't know sorry

Step-by-step explanation:

Mnenie [13.5K]3 years ago

6 0

Answer:

Step-by-step explanation:

preety much nothing thats like 1/90000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

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A house cleaning service claims that it can clean a four bedroom house in less than 2 hours. A sample of n = 16 houses is taken

Vera_Pavlovna [14]

Answer:

Option B is right

Step-by-step explanation:

$H_0: x bar =2\\H_a: x bar$

(One tailed test at 5% significance level)

n =16 and x bar =1.97

s =0.1

Std error of mean = $\frac{s}{\sqrt{n} } \\=0.025$

Mean diff = $1.97-2 =-0.03$

t statistic =Mean diff/se =-1.2

df =16-1=15

p value =0.124375

(B) do not reject the null because the test statistic (-1.2) is > the critical value (-1.7531).

3 0

3 years ago

What is the best approximation for the area of this circle? Use 3.14 to approximate pi. 25.1 in² 50.2 in² 201.0 in² 803.8 in² Ci

Greeley [361]

Answer:

The best approximation is $201.0\ in^{2}$

Step-by-step explanation:

we know that

The area of the circle is equal to

$A=\pi r^{2}$

In this problem we have

$r=8\ in$

$\pi =3.14$

substitute

$A=(3.14)(8^{2})=201.0\ in^{2}$

5 0

3 years ago

Read 2 more answers

How to find percent by divide the fraction?

Ludmilka [50]

Divide the top number by the bottom number and multiply that by 100

i hope this helps

7 0

3 years ago

As the limit of x goes to 3 from the left find the limit of (x/ sqrt x^2 -9)

Dimas [21]

$\displaystyle\lim_{x\to3^-}\frac x{\sqrt{x^2-9}}=\lim_{x\to3^-}\frac x{\sqrt{x^2}\sqrt{1-\frac9{x^2}}}=\lim_{x\to3^-}\frac x{|x|\sqrt{1-\frac9{x^2}}}$

Since $x>0$ , you have $|x|=x$ and the limand reduces to

$\displaystyle\lim_{x\to3^-}\frac1{\sqrt{1-\frac9{x^2}}}$

For $x>3$ , you have $\sqrt{1-\frac9{x^2}}>0$ since $\dfrac9{x^2}$ will always be smaller than 1, which means $\dfrac1{\sqrt{1-\frac9{x^2}}}\to+\infty$

8 0

4 years ago

I need help ASAP Please and thank you

yawa3891 [41]

You'd like to think 1 is true. I wonder if it really is though. There are so many horror stories out there about people in University courses that will be paid off by a McDonald's employee. (Sorry if that's you).

Again you hope this is true, but much depends on where you are. You can have a mansion in a ghetto area and it is worth next to nothing.

I should hope so.

The 4th one is a physical relationship. If the person is driving all the time it is true. There is a positive relationship.

The last one would have a random result.

All of these or none of them could have positive results. If you treat it as a pure math question, 1 should, 2 should, 3 should, 4 should and 5 should not. This question is far too subjective to get 100%. If you say anything at all, arguing it is very worthwhile. State your case and then shut up if your marker disagrees.

8 0

4 years ago