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3 years ago

Make the following conversion. 54 km = _____ cm 0.0054 0.00054 54,000,000 5,400,000

Mathematics

2 answers:

just olya [345]3 years ago

6 0

D)5,400,000 Is your answer....

Hitman42 [59]3 years ago

6 0

I'd do this step by step to avoid confusion.

So first, I'd convert 54 km to m (and I know that there are 1,000 m in a km).

So, 54 km to m = 54,000 m.

Now, I'm going to convert 54,000 m to cm (and I know that there are 100 cm in a m)

So, 54,000 m to cm = 5,400,000 cm.

Therefore, the final answer is 54 km = 5,400,000 cm.

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4 0

2 years ago

How do you solve (2x-7)(5x+3)=0

sammy [17]

Step-by-step explanation:

First I do it as separate equations 2x-7=0 and 5x+3=0. In this equation you get two answers so you first answer 2x-7=0

2x-7=0

+7 +7

2x=7

/2 /2

x=7/2

Then do 5x+3=0

-3 -3

5x=-3

/5 /5

x= -3/5

Then you can check by putting them back in.

7 0

3 years ago

Ted says that 3/10 multiplied by hundred equals 300,000s is he correct

Lostsunrise [7]

No. The answer is 30.

6 0

3 years ago

Help me with this please

Elina [12.6K]

Answer:

1) <2 ; 60

2) <3 ; 60

3) <4 and <3. <4 = 120 and <3 = 60

4) <1, <3, and <4 = 125. <2 = 55

Step-by-step explanation:

Corresponding angles are equal

Alternate interior angles are equal

<4 and <3 are same-side interior angles. This makes them supplementary angles

<4 = 120

<3 = 60

<1 = <4 = <3. All of these angles equal 125.

<2 + <1 = 180

<2 + 125 = 180

<2 = 55

8 0

2 years ago

In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsibl

ziro4ka [17]

Answer:

The hippocampus volumes in the alcoholic adolescents are less than the normal volume of 9.02 cm³

Step-by-step explanation:

Let x= the hippocampus volumes in the alcoholic adolescents

We'll conduct a hypothesis test at the 0.01 significance level with

Null hypothesis: x = 9.02 cm³

Alternate hypothesis: x < 9.02 cm³

A sample of 13 alcoholic adolescents gives the parameters

size=N= 13

mean=M= 8.12 cm³

standard deviation= s= 0.8 cm³

According to the sample, with 99% confidence, t statistic for the value X=9.02 can be found using the formula:

t= $\frac{X-M}{\frac{s}{\sqrt{N} } }$ where

M is the sample mean (8.12)
s is the standard deviation of the sample (0.8)
N is the sample size (13)

If we put these numbers in the formula:

t= $\frac{9.02-8.12}{\frac{0.8}{\sqrt{13} } }$ =4.056

One tailed critical value for the sample with 12 degrees of freedom (sample size-1) in 99% confidence level is 2.681.

Since t value (4.056) is bigger than the critical value, we fail to reject the alternate hypothesis, therefore reject the null hypothesis and accept alternate hypothesis.

5 0

2 years ago