2 years ago

Which of the following is equivalent to (4 x 10^-7) + (5 x 10^-7)

Mathematics

1 answer:

Vera_Pavlovna [14]2 years ago

3 0

The correct answer is D

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The Magazine Mass Marketing Company has received 10 entries in its latest sweepstakes. They know that the probability of receivi

Serjik [45]

Answer:

P(X>4)= 0.624

Step-by-step explanation:

Given that

n = 10

p= 0.5 ,q= 1 - p = 0.5

Two fifth of 10 = 2/5 x 10 =4

It means that we have to find probability P(X>4).

P(X>4)= 1 -P(X=0)-P(X=1)-P(X=2)-P(X=3)-P(X=4)

We know that

$P(X=x)=(_{x}^{n})\ p^xq^{n-x}$

$P(X=0)=(_{0}^{10})\ 0.5^0\ 0.5^{10}=0.0009$

$P(X=1)=(_{1}^{10})\ 0.5^1\ 0.5^{9}=0.0097$

$P(X=2)=(_{2}^{10})\ 0.5^2\ 0.5^{8}=0.043$

$P(X=3)=(_{3}^{10})\ 0.5^3\ 0.5^{7}=0.117$

$P(X=4)=(_{4}^{10})\ 0.5^3\ 0.5^{7}=0.205$

P(X>4)= 1 -P(X=0)-P(X=1)-P(X=2)-P(X=3)-P(X=4)

P(X>4)= 1 -0.0009 - 0.0097 - 0.043 - 0.117-0.205

P(X>4)= 0.624

8 0

2 years ago

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Jon earned $38,000 last year. He paid $6,840 towards entertainment. What percent of his earnings did Jon pay in entertainment ex

anastassius [24]

Take 38,000 minus 6,840 and then you got your answer

7 0

2 years ago

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When written in standard form, the quadratic equation, x2 - 2x - 35 = 0, is equivalent to y = (x - 1)2 - 36. What is the vertex

horrorfan [7]

y = a(x - b)^2 + c has vertex (b , c)

so here the vertex is (1, -36)

6 0

2 years ago

Help help help help

Crank

Answer:

C = 18

Step-by-step explanation:

Put the numbers in place of their symbols and do the arithmetic. The diagram is showing you r = 3.

C = 2πr

C = 2(3)(3) . . . . . using 3 for π, as directed

C = 18

3 0

1 year ago

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Complete the comparison: 2+7>? a. 9+4 b. 7+3 c. 10-2 d. 8+2

Zina [86]

The answer is c because 2+7=9 and 10-2=8 and 9 is greater than 8 so 2+7>10-2

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2 years ago