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notsponge [240]
3 years ago
6

1. a circular table with a radius of 18 inches is going to be covered with 2 in2 tiles. how many tiles will be needed to cover t

he top?
2. Mr Jones wants to add a cement path around his new pool. the pool has a radius of 7 feet. the cement path will be 1 foot wide and go all the way around the pool. what is the square footage of the path?

Mathematics
1 answer:
natta225 [31]3 years ago
7 0

Answer:

9 is the required answer

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Pleas please help me with my math problem! Thank You :)
dalvyx [7]

Check the picture below.

as you recall from the previous exercise, x = 74°, now, using the "inscribed angle theorem" as you saw already, the green intercepted arc is 160°, so y = 160° - 74°.

as far as ∡z, well, we can just use the "inscribed quadrilateral conjecture".

3 0
3 years ago
HELPPP ME PLEASE IVE BEEN 2 hours IN THIS QUESTIONN
Harlamova29_29 [7]

9514 1404 393

Answer:

  12.9 square yards

Step-by-step explanation:

The base is an equilateral triangle, so we can assume that the three faces have the same dimensions. Each of those face triangles has an area of ...

  A = 1/2bh

  A = 1/2(3 yd)(2 yd) = 3 yd²

The base area is computed using the same formula and the given height:

  A = 1/2(3 yd)(2.6 yd) = 3.9 yd²

Then the total surface area is that of the base and the three faces:

  SA = (3.9 yd²) + 3(3 yd²) = 12.9 yd² . . . total surface area

5 0
2 years ago
If 8% of all cell phones are defective, and you have a random sample group of 100 Samsung Galaxy Vills,
Sati [7]

Answer:

Mean = 8

Variance = 7.36

Standard Deviation = 2.7129

Step-by-step explanation:

This is a binomial distribution with parameters, n and p.

Where

n is sample size (given as 100)

p is the probability of success, or probability of defective (given as 8% or 0.08)

The mean, variance, standard deviation formula for binomial distribution is shown below:

Mean = np

Variance = npq

Standard Deviation = \sqrt{npq}

Where q would be probability of failure, or "1 - p"

Thus,

n = 100

p = 0.08

q = 1 - 0.08 = 0.92

SO, we have:

Mean = np=100*0.08=8

Variance = npq=100*0.08*0.92 = 7.36

Standard Deviation = \sqrt{npq}=\sqrt{7.36}=2.7129

5 0
3 years ago
Is the relation shown in the arrow diagram a function?
Irina-Kira [14]

Answer:

Yes. Every unique input has a unique output.

Step-by-step explanation:

Since every input has a different output, therefore it's a function. It's not a function when the input have more than 1 output. When graphing, make sure you take the vertical line test to see whether or not the graph is a function.

4 0
2 years ago
A fair tossed 10 times . Find the probability of obtaining (i) exactly four heads (ii) 3 heads and 7 tails (iii) at least one he
vodka [1.7K]

Answer:

0.205 ; 0.117 ; 0.999

Step-by-step explanation:

Using binomial probability distribution :

P(x =x) = nCx * p^x * (1 - p)^(n - x)

Probability of success, p = 0.5

P(x = 4) = 10C4 * 0.5^4 * 0.5^6

P(X = 4) = 0.205078125

B.) 3 heads and 7 tails

P(X = 7) = 10C7 * 0.5^7 * 0.5^3

P(X = 7) = 120 * 0.0009765625

P(X = 7) = 0.117

P(atleast one head)

P(x greater than equal to 1) = p(x =1) +... P(x = 10)

Using a binomial probability calculator :

P(x greater than equal to 1) = 0.999

3 0
3 years ago
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