3 years ago

100 envelopes cost $0.70 how much would it be for 250

Mathematics

2 answers:

34kurt3 years ago

7 0

It costs 1.75$ for 250 envelopes. each one of the envelopes cost 0.007$

timama [110]3 years ago

3 0

If 100 envelopes cost 0.70, this means that the cost of one envelope is $0.70 ÷ 100, which is $0.007.
The cost of 250 envelopes would then be 0.007 × 250, which is $1.75

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Find the probability of at least three successes in six trials of a binomial experiment in which the probability of success is 5

Amanda [17]

Answer:

31.3%

Step-by-step explanation:

Start by doing the binomial expansion of (x+y)^6 where x represents success. This is

(x^6y^0) + 6(x^5y^1) +15(x^4y^2) +20(x^3y^3) +15(x^2y^4) +6(x^1y^5) +(x^0y^6)

We are interested in the x^3y^3 term which represents exactly 3 successes. Since the probability of success and failure are both .5 we should be able to figure this out just using the coefficients of the terms which is

20/64 = .3125 which is 31.25% Rounding yo the nearest tenth gives us

8 0

3 years ago

9x^2+30x+25=0 graphed

pogonyaev

The graphical representation is give in image