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2 years ago

Please fast,please fast

Mathematics

1 answer:

wariber [46]2 years ago

5 0

Answer:

65536 mold spores

Step-by-step explanation:

After 3 hours , 4² mold spores are growing.

After 6 hours , 4³ mold spores are growing.

After 9 hours , 4⁴ mold spores are growing.

After 12 hours , 4⁵ mold spores are growing.

It means in every 3 hours , 4 new spores form and grow from each pre-existing spore.

⇒ After 15 hours , 4⁶ mold spores are growing.

⇒ After 18 hours , 4⁷ mold spores are growing.

⇒ After 21 hours , 4⁸ = 65536 mold spores are growing

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What is the circumference of a circle with a diameter of 23.4 inches? please hellp

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Answer:

Step-by-step explanation:

Circumference = 73.51

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3 years ago

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Jordan gets paid to mow his neighbor's lawn. For every week that he mows the lawn, he earns $20. What is the rule as an algebrai

lilavasa [31]

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3 years ago

A poll reported that 66% of adults were satisfied with the job the major airlines were doing. Suppose 20 adults are selected at

NARA [144]

Answer:

0.5640

Step-by-step explanation:

n = 12 (number of adults)

p = 0.65 (probability that an adult is satisfied with the job the major airlines were doing.

x = number of adults out of 11 who were satisfied.

P( x = 5) = 11C5 (0.65)^5 (0.35)^6 = 0.0986

P( x < 3) = P(x=0)+P(x=1)+P(x=2)

P( x =0) = 11C0 (0.65)^0 (0.35)^11 = 0.0000

P( x =1) = 11C1 (0.65)^1 (0.35)^10 = 0.0002

P( x =2) = 11C2 (0.65)^2 (0.35)^9 = 0.0018

Add: P( x < 3) = 0.0020

P( x ≥ 8) = P(x=8)+P(x=9)+P(x=10)+P(x=11)

P( x =8) = 11C8 (0.65)^8 (0.35)^3 = 0.2254

P( x =9) = 11C9 (0.65)^9 (0.35)^2 = 0.1395

P( x =10) = 11C10 (0.65)^10 (0.35)^1 = 0.0518

P( x =11) = 11C11 (0.65)^11 (0.35)^0 = 0.0087

add:

P( x ≥ 8) = 0.4254

P(x=4)+P(x=5)+P(x=6)+P(x=7)

P( x =4) = 11C4 (0.65)^4 (0.35)^7 = 0.0379

P( x =5) = 11C5 (0.65)^5 (0.35)^6 = 0.0985

P( x =6) = 11C6 (0.65)^6 (0.35)^5 = 0.1830

P( x =7) = 11C7 (0.65)^7 (0.35)^4 = 0.2428

Add: 0.5640

8 0

3 years ago

According to a report, 11 people got colds for every 2000 people.

lianna [129]

Answer:

Probability that one or more people in Arbalest got a cold is 0.9987.

Step-by-step explanation:

We are given that according to a report, 11 people got colds for every 2000 people.

There are 1200 people in the town of Arbalest.

The above situation can be represented through binomial distribution;

$P(X =r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r};x=0,1,2,3,......$

where, n = number of trials (samples) taken = 1200 people

r = number of success = one or more people got a cold

p = probability of success which in our question is probability

that people got colds, i.e; p = $\frac{11}{2000}$ = 0.55%

Let X = Number of people in Arbalest who got a cold

So, X ~ Binom(n = 1200 , p = 0.0055)

Now, Probability that one or more people in Arbalest got a cold is given by = P(X $\geq$ 1)

P(X $\geq$ 1) = 1 - P(X = 0)

= $1- \binom{1200}{0} \times 0.0055^{0} \times (1-0.0055)^{1200-0}$

= $1- (1 \times 1 \times 0.9945^{1200})$

= 0.9987 or 99.87%

Hence, the required probability is 99.87%.

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3 years ago

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rosijanka [135]

Answer:

Step-by-step explanation:

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2 years ago