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2 years ago

Can U help me pwz owo

Mathematics

1 answer:

ioda2 years ago

4 0

Hey don’t bully I don’t know how to do this sorry :(

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A pond has 150 fish and the population decreases by 8% each day. How many days before there are 30 fish

nlexa [21]

Answer:

19 days

Step-by-step explanation:

Given

$a = 150$ --- initial

$r = 8\%$ -- rate

Required

Days when the fish gets to 30

The function is exponential and as such it follows;

$y = ab^x$

Where x represents the number of days and y the number of fishes

Because the fishes decreases;

$b = 1 - r$

So, we have:

$b = 1 - 8\%$

Express as decimal

$b = 1 - 0.08$

$b = 0.92$

In $y = ab^x$

$a =150$

$y = 30$

$b = 0.92$

So, we have:

$30 = 150 * 0.92^x$

Divide both sides by 150

$0.2 = 0.92^x$

Take log of both sides

$log(0.2) = log(0.92^x)$

Apply law of logarithm

$log(0.2) = x\ log(0.92)$

Make x the subject

$x = \frac{log(0.2)}{log(0.92)}$

$x = \frac{-0.6990}{-0.0362}$

$x = 19.309$

$x \approx 19$

Hence, it takes approximately 19 days

3 0

2 years ago

On a coordinate plane, a circle has a center at point (negative 6, 4). What is the equation of the circle shown in the graph? (

lukranit [14]

Answer:

1) x+6 2)y-4 3)36

Step-by-step explanation:

(x+6)² + (y-4)² = 36

5 0

3 years ago

Read 2 more answers

The profits of mr cash’s company is represented by the equation p(t)=-3t^2+18t-4, where p(t) is the amount of profit in hundreds

eduard

We have that

p(t)=-3t^2+18t-4

using a graphing tool, we can see the maximum of the graph
(see the attached figure)

A) In what year of operation does Mr. Cash’s business show maximum profit?

Mr. Cash’s business show maximum profit at year 3 (maximum in the parabole)

B) What is the maximum profit?

23 (hundred of thousand of dollars) = 2.300.000 dollars

c) What time will it be two late?

(This is the time when the graph crosses zero and the profits turn into losses )

5.77 years, or an estimate of about 69 months.