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Mice21 [21]
3 years ago
11

Proposition 2.30. Suppose X and Y are topological spaces, and f : X → Y is any map. (a) f is continuous if and only if f (A c f(

A) for all ASX. (b) f is closed if and only if f (A) 2 f(A) for all A CX. (c) f is continuous if and only if f -(Int B) Intf-?(B) for all B CY. (d) f is open if and only if f-'(Int B) 2 Int f-'(B) for all B C Y.
Mathematics
1 answer:
V125BC [204]3 years ago
4 0

Answer:

54

Step-by-step explanation:

lkjiuyog

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B. Mason put sticky notes on some pages of his math book. The page numbers form this sequence: 3, 5, 8, 13, 21, 34, ... Describe
laiz [17]

Answer:

It goes up one number counting each time

Step-by-step explanation:

3 4 5  2 one cap

5 8 13   two cap

3 0
3 years ago
What is m<4+m<5+m<6?
viktelen [127]

Answer:

<h2>m < 1</h2>

Step-by-step explanation:

m

4 0
3 years ago
Use distributive property to calculate the following.
sattari [20]

Answer:

Step-by-step explanation:

1. 2x + y

2. 48 +  60 = 108

3. 840 - 210 = 630

4 0
2 years ago
A sleep time of 15.9 hours per day for a newborn baby is at the 10h percentile of the distribution of sleep times for all newbor
Nuetrik [128]

Answer:

option (D) 16.5

Step-by-step explanation:

Data provided:

Sleep time of , X = 15.9 is at the 10th percentile

Standard deviation, σ = 0.5  hour

also,

10th percentile of normal distribution is

Z = F⁻¹(0.10)

or

Z = - 1.28  (Using Standard Normal distribution)

Now,

\\Z=\frac{X-\mu}{\sigma}

or

X = μ + ( σ × Z )

or

μ = X - ( σ × Z )

on substituting the respective values, we get

μ = 15.9 - 0.5 × (-1.28)

or

μ = 16.5

Hence, the correct answer is option (D) 16.5

8 0
3 years ago
In the Cash Now lottery game there are 8 finalists who submitted entry tickets on time. From these 8 tickets, three grand prize
alexgriva [62]

Answer:

The number of ways is  \left n} \atop {}} \right. P_r  =  336

Step-by-step explanation:

From the question we are told that

   The number of tickets are   n = 8

    The number of finalist are r   =3

Generally the number of way by which this winners can be drawn and arrange in the order of   1^{st} , \  2nd ,  \  3rd    is mathematically represented as

             \left n} \atop {}} \right. P_r  =  \frac{n\ !}{(n-r) !}

substituting values

             \left n} \atop {}} \right. P_r  =  \frac{ 8!}{(8-3) !}

           \left n} \atop {}} \right. P_r  =  \frac{ 8* 7*6*5*4*3*2*1}{ 5*4*3*2*1}

           \left n} \atop {}} \right. P_r  =  336

3 0
3 years ago
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