MATHEMATICS HIGH SCHOOL

The Canadian $2 coin has a copper centre surrounded by a ring of nickel. The diameter of the coin is 2.8 cm. The area of the copper centre is 2.0 cm2 . What is the area of the nickel ring

Answers

Answer 1
Answer:

Answer:

           6.0 cm²

Step-by-step explanation:

Area of the coin:

A_c = d\pi\n\nA_c = 2.8\pi\approx8.8\ cm^2

So area of the ring:

A = 8.8 - 2.0 = 6.0 cm²
Answer 2
Answer:

Answer:

4.15

Step-by-step explanation:

d = 2.8cm,  a = 1.4cm

a = πr2

a = 3.14 * 1.42

a = 3.14 * 1.96

a = 6.15cm2

6.15 - 2 = 4.15

The area of the nickel ring is 6.15cm2

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Which expression is equivalent to 3/2⋅3/2⋅3/2⋅3/2 ? 3/2⋅4 3/42 3/24 (3/2)4

B) Write 1.74 x 10^4 as an ordinary number.

Answers

Answer:

17400

Step-by-step explanation: i might get this wrong but just do 1.74*10^4 and it should equal 17400

Can anyone help me out with this

Answers

Answer:

X = 62.4

Step-by-step explanation:

To find x or the weight of water per one cubic foot we take the 12.48 and divide it by two

12.48 = 6.24

Then multiply 6.24 by ten because 6.24 is the weight of .1 cubic feet

6.24 * 10 = 62.4

To check and make sure we calculated it correctly we can do 6.24 * 17 to find the weight of the larger tank

6.24 * 17 = 106.08

And 6.24 * 15 to find the weight of the smaller tank

6.24 * 15 = 93.6

The subtract 93.6 from 106.08

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Read the scenario and respond to the following statements and questions. Jeremy went to the mall with $150. He went into one Estimate the total cost of these items, including tax. store where he found the following items that he wanted: Jeans $59.50 each Will Jeremy have enough money to purchase all the items? Shirts $30 each Hats $15.50 each At the store Jeremy is given the choice between two coupons, Jeremy wants to purchase 1 pair of jeans, 3 shirts, 25% off one item or 15% off his entire order, which he can use and 1 hat. The store is having a sale of 10% off all with the 10% off of all shirts. Estimate which coupon will save shirts and the sales tax in Houston is 8.25%, so Jeremy the most money. Jeremy has to take that into consideration when buying his items. . 5 ​

Answers

Answer:

kind of confusing

Step-by-step explanation:

The ratio of men to women on a train was 5:8 there was 200 men-
A- how many women were on the train
B- how many people were on the train all together

Answers

5x-\ number\ of\ men\n\n8x-\ number\ of\ women\n\n5x=200\ \ \ |divide\ by\ 5\nx=40\n\nWomen: 8x=8*40=320\nMen:5x=5*40=200\n\Together:320+200=520

What is the slope of the line that contains the points (2,-5) and (-4,-1)

Answers

Your rise over run is (-6,4).

HELP ASAP PLEASE???!!!

Answers

Hi

You need to start by multiply all terms by (x-2)(x+1) and cancel

x(x+1)(x-1)(x-2)=-1(x-2)(x+1)

2x²-2x+2=-x²+x+2

Now you need to subtract -x²+x+2

2x²-2x+2-(-x²+x+2)=-x²+x+2-(-x²+x+2)

3x²-3x=0

Now factorize

3x(x-1)=0

3x=0 or x-1=0

x= 0 or x=1


I hope that's help and good luck :0
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