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3 years ago

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Harold has 2384 g of zinc for his science experiment how many kilograms of zinc does he have? PLEASE HELP I AM TAKING OVERDUE HO

MEWORK

1 answer:

UNO [17]3 years ago

3 0

Harold has 2.384 kilograms of zinc

To convert grams to kg, multiply the gram value by 0.001 or divide by 1000.

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55 points see attachment below

Ludmilka [50]

Answer:

f(3) = -20

Step-by-step explanation:

To find the value of a function, substitute the number for the variable and do the arithmetic.

f(x) = -2x^2 +x -5 . . . . . . given

f(3) = -2(3^2) +(3) -5 . . . . function value for x = 3

f(3) = -2(9) +3 -5 = -18 +3 -5

f(3) = -20

4 0

2 years ago

Approximately 13.2% of US drivers are younger than age 25, with 37.7% in the 25-44 age group, and 49.1% in the 45-and-over-categ

Elan Coil [88]

Answer:

could not be the same

Step-by-step explanation:

Given that approximately US drivers are agewise as follows:

<25 13.2

25-45 37.7%

>45 49.1%

Observations are made for a sample of 200 fatal accidents.

Let us create hypotheses as

$H_0: Proportions age wise are the same as for US drivers\\H_a: Proportions are different$

(Two tailed chi square test at 5% significance level)

Age <25 25-45 >45

Expected 13.2 37.7 49.1 100

Observed 42 80 78 200

Expected no 26.4 75.4 98.2 200

Chi square 9.218181818 0.280636605 4.155193483 13.65401191

df = 2

p value = 0.001084

Since p <0.05 we reject null hypothesis

At the 0.05 level, the age distribution of drivers involved in fatal accidents within the state could not be the same as the age distribution of all US drivers as there seems to be significant difference.

5 0

3 years ago

2. Write the square root of 45 to: <br>a) 2 decimal places <br>b) 2 significant figures

Butoxors [25]

Answer: 6.71, and 6.7

Step-by-step explanation:

In order to write to two decimal places, we must first calculate the square root of 45.

The square root of 45 is 6.708

Therefore, when we round, we get 6.71

In order to write to two sig figs, we remember that sig figs are the number digits without zeros on the end.

Therefore, all we take is the 6.7

3 0

3 years ago

Read 2 more answers

You babysit to make a little extra money. You charge $12 an hour and earned $180 by the end of the month. How many hours did you

BabaBlast [244]

Answer:

The equation is 12x=180. You worked for 15 hours.

Step-by-step explanation:

Do 12x=180 then divide by 12. You get x=180/12. Then simplify

4 0

3 years ago

Read 2 more answers

Evaluate help please!

UNO [17]

<h2><u>ABSOLUTE VALUE</u></h2>

The absolute value of a number is the distance from 0 to that number. The distance is positive, hence, the absolute value is always a positive number.

<h3>Exercise</h3>

Replace the value of x:

$| x - 8 |$

$| -4 - 8 |$

$| -12 | = \large{\boxed{12}}$

The absolute value of a number is the numerical value of the number, without regard to its sign.

<h3><u>Answer.</u> 12</h3>

3 0

3 years ago