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pshichka [43]
2 years ago
12

I dont really understand this so can someone help me please!

Mathematics
1 answer:
pychu [463]2 years ago
3 0
The area of a circle is pi times the radius squared. the radius of this circle is 16.8cm, which is 282cm when squared. multiplied by pi it becomes 887cm.
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Kevin had a total of $320 to spend while shopping. He had spent $156 on video games. He wants to buy caps that are on sale for $
zloy xaker [14]

Maximum number of caps that Kevin can buy is 10.

Solution:

Total money for shopping = $320

Amount spent for video game = $156

Remaining amount that Kevin had = $320 – $156

                                                         = $164

Cost of each cap including tax = $15

$\text{Number of caps can buy }=\frac{\text { Remaining amount that Kevin had }}{\text { cost of each cap }}$

                                       $=\frac{164}{15}

                                      $=10\frac{14}{15}

Maximum number of caps that Kevin can buy is 10.

8 0
3 years ago
Molar mass of FeCl3, Co(NO3)2, C4H10O, and Cu(NO3)2? Show work.
N76 [4]

Molar mass of FeCl₃ 162.204 g/mol

Molar mass of  C₄H₁₀O is 74.1212 g/mol

Molar mass of Cu(NO₃)₂ is 187.5594 g/mol

<u>Step-by-step explanation:</u>

Molar mass is also termed as molecular mass of the compound. So it is the measure of the amount of mass present in the given molecule. It can be obtained by adding the products of number of atoms with their molecular mass.

For example, in order to find the molar mass of FeCl₃, the molecular mass of Fe is noted as 55.845 g/mol and the molecular mass of Cl is noted as 35.453 g/mol.

As FeCl₃ contains one atom of Fe and 3 atoms of Cl, then the

Molar mass = (Number of Fe atoms × Molecular mass of Fe) + ( Number of Cl atoms × Molecular mass of Cl)

Molar mass of FeCl₃ = (1×55.845)+(3×35.453)=162.204 g/mol.

Similarly, the molar mass of C₄H₁₀O will be

Molar mass = (4×Mass of C) + (10×Mass of H) + (1 × Mass of O)

Molar mass = (4×12.0107)+(10×1.00784)+(1×16)=74.1212 g/mol

Then the molar mass of Cu(NO₃)₂ will be

Molar mass = (1× Mass of Cu) + (2×Mass of N)+(6×Mas of Oxygen)

Molar mass = (1×63.546)+(2×14.0067)+(6×16)

Molar mass = 187.5594 g/mol

5 0
2 years ago
43. ALGEBRA Assume that your current
RoseWind [281]

Answer:

10582

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The Therrell High Marching Band is selling candy bars for a fundraiser.
igor_vitrenko [27]

Answer:

3x ≥ 45

15, 20 , 25

Step-by-step explanation:

Let's call the number of bars Renee sold as " x "

Let's call the number of bars Robin sold as " y "

Robins, y, sold two times as many bars as Renee, x

That means Robin sold 2 times x or 2x

So y = 2x

The sum of bars Renee, x,  and Robin, 2x, sold together are no less than 45

No less than 45 means the number of bars have to be greater than or equal to 45

x + 2x ≥ 45

3x ≥ 45

x ≥ 15

Renee can sell, 15, 20, or 25 bars .   (just has to be bigger or equal to 15)

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

6 0
2 years ago
Need help on all please​
kipiarov [429]

#1: 7

#2: 55

#3: 15

#4: 3

#5: 12

#6: 27

#7: 11

#8: 27

#9: 14

#10: 6

#11: 9

#12: 28

#13: 12

#14: 30

#15: 45

#16: 6

#17: 14

#18: 9

#19: 54

#20: 8

8 0
2 years ago
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