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2 years ago

Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

const2013 [10]2 years ago

4 0

Function:

f(x) = 30x (75%) + 1

Bacteria after 2 hours:

10,890 bacteria

Zina [86]2 years ago

3 0

Answer:

I'm not sure about the function but here is the answer: 3

Step-by-step explanation:

Well, 75% of 1 is 0.75 + 75% of that + 75% of that and so on until you do it four times. Why four? Well it increases every 30 MINUTES so 30 min + 30 min + 30 min + 30min = 2 hours!

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Plz help me, URGENT!! 15 points!

bulgar [2K]

Answer:

i just neeed the points

Step-by-step explanation:

5 0

3 years ago

In a field there are cows, birds, and spiders. Spiders have 4 eyes and 8 legs each. In the field there are 20 eyes and 30 legs.

Kitty [74]

Answer:

1 spider, 3 cows, 5 birds.

Step-by-step explanation:

Cows (C): 4 legs, 2 eyes.

Birds (B): 2 legs, 2 eyes.

Spiders (S): 8 legs, 4 eyes.

The number of legs and eyes are given, respectively by:

$30 = 4C+2B+8S\\20 = 2C+2B+4S$

Multiplying the second equation by -2 and adding it to the first one gives us the number of birds:

$30 -40= 4C-4C+2B-4B+8S-8S\\-10 = -2B\\B=5$

Rewriting the original equations with B =5:

$30 = 4C+2*5+8S\\20 = 2C+2*5+4S\\20 = 4C+8S\\10 = 2C+4S\\C=5-2S$

Since the number of cows cannot be negative, and both C and S must be odd numbers, the only possible value of S is 1:

$C=5-2S\\S=1\\C=3$

7 0

3 years ago

Scoring a hole-in-one is the greatest shot a golfer can make. Once 5 professional golfers each made holes-in-one on the 7th hole

adell [148]

A) Probability that at least one of these golfers makes a hole in one on the 10th hole at the same tournament is

=1−(2493/2494)^5
=1-(0.99)^5
= 1- 0.96
=0.4

b) The probability that all of these golfers make a hole-in-one on the 10th hole at the same tournament
=(1/2494)5

which is nearly zero.

5 0

3 years ago

What is the sum of the 12th square number and the 10th square number?

ivann1987 [24]

Answer:

12^2 is 144 and 10^2 is 100 :)

Step-by-step explanation:

12 * 12 = 144

10 * 10 = 100

5 0

2 years ago

Which answers are examples of inductive reasoning? Choose all answers that are correct. The water temperature at the beach was 7

stiks02 [169]

The water temperature at the beach was 75° every day for the past2 weeks. The water temperature at the beach will be 75° today. All even numbers are divisible by 2. Sixty-four is an even number. Sixty-four is divisible by 2.

others are deductive reasoning
The library charges a $0.20 fine each day a book is overdue. Mary is returning a book that is 5 days overdue. Therefore, Mary will pay a $1.00 fine. All observed brown dogs are small dogs. Therefore, all small dogs are brown.

8 0

3 years ago

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