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WITCHER [35]
3 years ago
10

Can you help me pls i have 1 day

Mathematics
1 answer:
Nesterboy [21]3 years ago
7 0

Answer:

-9

Step-by-step explanation:

2t + 8= -10

2t= -10-8 you bring 8 and it turns to a negative and. then you just minus it negative 10.

2t= -18. you divide both by 2

t= -9

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Exponential growth can anyone give the answers to me? I’m completely lost!
PilotLPTM [1.2K]

Answer:

Q1

<u>The exponential growth model for frogs:</u>

  • F(x) = 100(1.22)ˣ,

F- number of frogs, x- number of years, 1.22 - growth factor

<u>Calculations</u>:

  • F(5) = 100(1.22)⁵ = 270
  • a) F(10) = 100(1.22)¹⁰ = 730
  • b) F(20) = 100(1.22)²⁰ = 5335  

<em>All numbers rounded </em>

Q2

<u>The exponential growth model for bacteria:</u>

  • B(x) = 10(1.8)ˣ

B- number of bacteria, x- number of hours, 1.8 - growth factor

<u>Calculations:</u>

  • a) B(5) = 10(1.8)⁵ = 189
  • b) B(24) = 10(1.8)²⁴ = 13382588
  • c) B(168) = 10(1.8)¹⁶⁸ = 7.68 * 10⁴³

<em>All numbers rounded </em>

Q3.

<u>The exponential growth model for fish:</u>

  • F(x) = 821(1.02)ˣ,

F- number of fish, x- number of months, 1.02 - growth factor

<u>Calculations:</u>

  • a) F(12) = 821(1.02)¹² = 1041
  • b) F(120) = 821(1.02)¹²⁰ = 8838

<em>All numbers rounded </em>

3 0
3 years ago
Read 2 more answers
Please Help!!!!!
Natalija [7]
The answer to #1 is 9 to 30
the answer to #2 is 4 to 3
6 0
3 years ago
Read 2 more answers
Help asap!! 15 points!!
adoni [48]

Answer:

a) y = -500x + 130,000

b)67,500 gallons remaining

c) 260 hours

Step-by-step explanation:

Since water is being removed at a rate of 500 gallons per hour, the slope would be a negative.

a) y = -500x + 130,000

For<u> part b</u> input 125 for x:

y = -500(125) + 130,000

y = 67,500

There are 67,500 gallons remaining

For part c we are solving for the x intercept

0 = -500x + 130,000

Subtract 130,000 from both sides

-130,000 = -500x

x = 260

It will take 260 hours for the pool to completely drain

8 0
3 years ago
Scientists want to estimate the mean weight of mice after they have been fed a special diet. From previous studies, it is known
Assoli18 [71]

Answer: n = 267

Step-by-step explanation: <u>Margin</u> <u>of</u> <u>Error</u> shows the percentage that will differ the result you get from the real population value or, in other words, is the range of values in a confidence interval.

It can be calculated as

margin of error = z\frac{s}{\sqrt{n} }

in which

z is z-score related to the confidence interval, which is this case is 1.96;

s is standard deviation;

n is the number in a sample;

So, the number of mice must be:

margin of error = z\frac{s}{\sqrt{n} }

0.6=1.96\frac{5}{\sqrt{n} }

\sqrt{n}=\frac{1.96*5}{0.6}

\sqrt{n}=16.33

n = 267

<u>For the margin of error with 95% confidence interval be 0.6, it is needed </u><u>267 mice</u><u>.</u>

6 0
3 years ago
Find the slope of a ski run that descends 15 feet for every horizontal change of 24 feet
Setler79 [48]
Slope=rise/run
rise=-15 feet (since it's downhill)
run=24 feet
slope=-15/24=-5/8
slope=-5/8
6 0
3 years ago
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