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2 years ago

Help Me Please I will give brainliest if correct!

Mathematics

2 answers:

il63 [147K]2 years ago

3 0

Answer:

9 $c^{7}$

Step-by-step explanation:

$c^{-4}$ is equal to $\frac{1}{c^{4} }$ . $\frac{9c^{3} }{\frac{1}{c^{4} } }$ is equal to $9c^{7}$ .

bagirrra123 [75]2 years ago

3 0

Answer:9c7

Step-by-step explanation:

(Sorry if im late but it’s 9c7)

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Sam is saving for a guitar. He already has $50 saved and intends to save $30 each week. Sam found a guitar that costs $410. Afte

maxonik [38]

Answer:

12 weeks

Step-by-step explanation:

30 x 12 = 360

which equals 12 weeks in this case and 360 + 50 equals 410 the 50 came from the 50 he already had

I hope this helps!!

4 0

3 years ago

If the growth rate of bacteria at any time t is proportional to the number present at t and triples in 1 week

serg [7]

The population after 20 weeks will be 403.42 $x_{0}$ in which $x_{0}$ is the initial population.

Given that the growth rate of bacteria at any time t is proportional to the number present at t and triples in 1 week.

We are required to find the number of bacteria present after 10 weeks.

let the number of bacteria present at t is x.

So,

dx/dt∝x

dx/dt=kx

1/x dx=k dt

Now integrate both sides.

$\int\limits {1/x} \, dx$ = $\int\limits{k} \, dt$

log x=kt+log c----------1

Put t=0

log $x_{0}$ =0 +log c ( $x_{0}$ shows the population in beginning)

Cancelling log from both sides.

c= $x_{0}$

So put c= $x_{0}$ in 1

log x=kt+log $x_{0}$

log x=log $e^{kt}$ +log $x_{0}$

log x=log $e^{kt}x_{0}$

x= $e^{kt}x_{0}$

We have been given that the population triples in a week so we have to put the value of x=2 $x_{0}$ and t=1 to get the value of k.

2 $x_{0}$ = $e^{k} x_{0}$

2= $e^{k}$

log 2=k

We have to now put the value of t=20 and k=log 2 ,to get the population after 20 weeks.

x= $e^{20log 2}$ $x_{0}$

x= $e^{0.30*2}$ $x_{0}$

x= $e^{6}x_{0}$

x=403.42 $x_{0}$

Hence the population after 20 weeks will be 403.42 $x_{0}$ in which $x_{0}$ is the initial population.

Learn more about growth rate at brainly.com/question/25849702

#SPJ4

The given question is incomplete as the question incudes the following:

Calculate the population after 20 weeks.

5 0

2 years ago

Can some one explain what an arithmetic sequence is...?

EastWind [94]

Answer:

An arithmetic sequence is an infinately long set of numbers that increase by a certain amount(this amount is called the common difference) every number. for example, 1,2,3,4,5... is an arithmetic sequence with a common difference of one.

8 0

3 years ago

How many times larger is 3.5 than 3.25

Leona [35]

.25 because .5 is the same as .50 and 25 divided by 2 is 25 and its .25 as a final

5 0

3 years ago

Read 2 more answers

In the diagram below, quadrilateral ABCD is inscribed in a circle. What is the measure of angle D?

grin007 [14]

Given:

In the circle P, ABCD is inscribed quadrilateral.

And, ∠DAB = 110°, ∠ABC = 72°

To find the value of ∠ADC.

Theorem:

A quadrilateral can be inscribed in a circle if and only if the opposite angles are supplementary [ sum of the opposite angles will be 180°]

According to the theorem,

$\angle ABC+\angle ADC = 180^{\circ}$

$\angle ADC +72^{\circ} = 180^{\circ}$

$\angle ADC = 180^{\circ}-72^{\circ}$

$\angle ADC = 108^{\circ}$

Hence,

The value of ∠ADC is 108°.

Hence, Option b is the correct answer.

5 0

3 years ago