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3 years ago

What is 42, 100, 000, 000 in scientific notation?

Mathematics

2 answers:

ira [324]3 years ago

7 0

Answer:

4.21 to the power of 10 (aka a little 10 next to it)

Step-by-step explanation:

maksim [4K]3 years ago

3 0

Answer:

4.21×10^10

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Hope this helps :)

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Georgianna claims that in a small city renowned for its music school, the average child takes at least 5 years of piano lessons.

Allisa [31]

Answer:

The condition are

The Null hypothesis is $H_o : \mu = 5$

The Alternative hypothesis is $H_a : \mu < 5$

The check revealed that

There is sufficient evidence to support the claim that in a small city renowned for its music school, the average child takes at least 5 years of piano lessons

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 5 \ year$

The sample size is n = 20

The sample mean is $\= x = 4.6 \ years$

The standard deviation is $\sigma = 2.2 \ years$

The Null hypothesis is $H_o : \mu = 5$

The Alternative hypothesis is $H_a : \mu < 5$

So i will be making use of $\alpha = 0.05$ level of significance to test this claim

The critical value of $\alpha$ from the normal distribution table is $Z_\alpha = 1.645$

Generally the test statistics is mathematically evaluated as

$t = \frac{\= x - \mu}{ \frac{\sigma }{\sqrt{n} } }$

substituting values

$t = \frac{ 4.6 - 5}{ \frac{2.2}{\sqrt{20} } }$

$t = -0.8131$

Looking at the value of t and $Z_{\alpha }$ we see that $t < Z_{\alpha }$ so we fail to reject the null hypothesis

This implies that there is sufficient evidence to support the claim that in a small city renowned for its music school, the average child takes at least 5 years of piano lessons.

4 0

3 years ago

Paige has 4 more balloons than Zoee. Emma has 2 more balloons than Paige. Altogether they have 100 balloons. How many does each

aksik [14]

52 and 48 if you take away 2 from 50 then,add it to the other 50 52+48

6 0

3 years ago

Choose values for n and graph. f(n) = n to the second power + (-2)

Rus_ich [418]

No clue what the answer is I am not that good I am blonde
now goodbye

5 0

3 years ago

8. It took Sharon 85 minutes to wash three cars. She spent x minutes on each car and 10 minutes

Yuliya22 [10]

Answer:

c. 25 minutes

Step-by-step explanation:

3x + 10 = 85

3x = 85 - 10

3x = 75

x = 25

8 0

3 years ago

1520 divided by 83 it has r

Amanda [17]

18 with a remainder of 26 I got this by using a long division calculator I hope this helps you

7 0

3 years ago

Read 2 more answers