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alukav5142 [94]
4 years ago
10

1. What is the area of a circle with a diameter of 3.4 cm? Round your answer to the nearest tenth. (use 3.14 for pi)

Mathematics
1 answer:
Brilliant_brown [7]4 years ago
7 0
1. The area of a circle is
a = \pi {r}^{2}
\pi = 3.14 \\ r =  \frac{3.4}{2}  = 1.7
a = (3.14) {(1.7)}^{2}  \\  = 9.0746
The area is 9.07 cm^2.

2. The volume of a cube is
v =  {s}^{3}
s = 4.5
v =  {(4.5)}^{3}  \\  = 91.125
The volume is 91.125 m^3
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a solution of trioxonitrate (v) acid contained 0.67g in 100cm³. 31cm³ of this solution neutralized 25cm³ of a sodium trioxocarbo
FinnZ [79.3K]

Answer:

0.67 / 100 : 31^3 : 31^3 / 25cm^3

x 10

0.67 / 100 = 67 / 10000000  grams/cm  :  29791 / 15625 / 29791    

149253.731  : 0.52

divide by 1000

= 149.253731

= 149.3 kg

Ratio kg = 149.3 : 0.5

Step-by-step explanation:

Mole Ratio

The mole ratio compares the number of moles in a balanced equation.

This is the comparison between the coefficients in front of the chemical formulas.

If a formula lacks a coefficient, it is the same as saying there is 1 mole of that species.

Mole ratios are used to predict how much product a reaction forms or to determine how much reactant is needed to make a set amount of product.

Mole Ratio Units

Mole ratio units are either mole:mole or else it is a dimensionless number because the units cancel out. For example, it's fine to say a ratio of 3 moles of O2 to 1 mole of H2 is 3:1 or 3 mol O2: 1 mol H2.

5 0
3 years ago
The triangle in the image are similar. Solve for x.<br><br> A. 7<br> B. 6<br> C. 10<br> D. 5
koban [17]
36/30=1.2
30/1.2=25
3x+4=25
3x=21
X=7
Therefore a is your answer
Hope this helps
5 0
4 years ago
Read 2 more answers
Similar Triangles
Fudgin [204]

Answer:

B. 3/9 = 4/12 = 1/3

Step-by-step explanation:

I calculated it logically

3 0
3 years ago
For mutually exclusive events we can use the ____ Principle of Counting.
leonid [27]
Fundamental principle of  counting
5 0
3 years ago
Daniel owns a synall business selling used books. He knows that in the last week 60
zzz [600]

The probability that the next customer that comes into Daniel's business will pay with a credit card is 23 / 87.

<h3>What is the probability?</h3>

Probability determines how likely it is that an event would happen. The probability the event occurs is 1 and the probability that the event does not occur is 0.

The probability that the next customer will pay with a credit card = number of people who paid with a credit card / total number of customers

23 / (23 + 60 + 4)

23 / 87

To learn more about probability, please check: brainly.com/question/13234031

5 0
2 years ago
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