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3 years ago

100 students attended a revision lesson at the weekend.

Mathematics

1 answer:

solniwko [45]3 years ago

4 0

Answer:

I am pretty sure its 30 students

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Probability The average time between incoming calls at a switchboard is 3 minutes.if a call has just come in,the probability tha

Stels [109]

Answer:

a) 0.1535

b) 0.4866

c) 0.8111

Step-by-step explanation:

The probability that the next call come within the next t minutes is:

$p(t) = 1 -e ^{- t/3}$

According to this model,

a) the probability that a call in comes within 1/2 minutes is $p(t) = 1 -e ^{- (1/2)/3}$ =0.1535

b) the probability that a call in comes within 2 minutes is $p(t) = 1 -e ^{-2/3}$ =0.4866

c) the probability that a call in comes within 5 minutes is $p(t) = 1 -e ^{-5/3}$ =0.8111

6 0

3 years ago

Proof. Give: <1 and <2 are complementary, angle 1 is congruent to angle 3 and angle 2 is congruent to angle 4. Prove: angl

dangina [55]

<1 and <2 are complementary : given
<1+<2=90 : definition of complementary
<1 congruent <3 : given
<2 congruent <4 : given
<3 congruent <4 : transitive property

5 0

3 years ago

I need to solve the equation for z

Greeley [361]

I think this is how you do it...

7 0

4 years ago

Read 2 more answers

Evaluate xy-x; use c =4, and y =4

Ilya [14]

Answer:

Step-by-step explanation:

You would substitute

4(4)-4

then simplify

16-4

then subtract

4 0

3 years ago

Sketch a graph of f(x)

just olya [345]

Answer:

The graph in the attached figure

Step-by-step explanation:

we know that

For $x\leq -2$ -----> the interval is (-∞,-2]

$f(x)=-3$

For $-2 < x \leq 1$ -----> the interval is (-2,1]

$f(x)=x$

For $x > 1$ -----> the interval is (1,∞)

$f(x)=2$

The graph in the attached figure

3 0

3 years ago