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3 years ago

Will give brainliest answer

Mathematics

2 answers:

Aneli [31]3 years ago

8 0

Answer:

Step-by-step explanation:

Anika [276]3 years ago

5 0

Answer:

i think A

Step-by-step explanation:

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Evaluate 7/3r+5/8s when r=14 and s=8

VMariaS [17]

Answer:

the answer is 47/192

Step-by-step explanation:

8 0

3 years ago

The population of a local species of bees can be found using an infinite geometric series where a1=860 and the common ratio is 1

erma4kov [3.2K]

$a_1=860$
$a_2=\dfrac{a_1}5$
$a_3=\dfrac{a_2}5=\dfrac{a_1}{5^2}$
$\vdots$
$a_n=\dfrac{a_{n-1}}5=\dfrac{a_{n-2}}{5^2}=\cdots=\dfrac{a_1}{5^{n-1}}$

The $k$ th partial sum is

$\displaystyle S_k=\sum_{n=1}^ka_n=\sum_{n=1}^k\frac{a_1}{5^{n-1}}$
$S_k=a_1\left(1+\dfrac15+\dfrac1{5^2}+\cdots+\dfrac1{5^{k-2}}+\dfrac1{5^{k-1}}$
$\dfrac15S_k=a_1\left(\dfrac15+\dfrac1{5^2}+\dfrac1{5^3}+\cdots+\dfrac1{5^{k-1}}+\dfrac1{5^k}\right)$

$\implies S_k-\dfrac15S_k=a_1\left(1-\dfrac1{5^k}\right)$
$\dfrac45 S_k=860\left(1-\dfrac1{5^k}\right)$
$S_k=1075-\dfrac{1075}{5^k}$

As $k\to\infty$ , we're left with

$\displaystyle\sum_{n=1}^\infty a_n=\lim_{k\to\infty}\left(1075-\frac{1075}{5^k}\right)=1075$

which is the upper limit to the population of the bees.

4 0

3 years ago

PLZ Help. WILL MARK BRAINLIEST. Pre Calc

Dafna1 [17]

Uhmmmmmmm..... Im pretty sure its A. If my statement is correct then please mark the brainiest!

I hope this helps!

6 0

3 years ago

The basic price for an annual dental checkup and cleaning is $50. If the dentist finds any cavities in there will be an addition

Slav-nsk [51]

Answer:

100n+50

Step-by-step explanation:

the dentist charges $100 dollars per cavity found. Per indicates multiplication. Since there is an additional fee, we add $50 to the $100n, which will make the expression

$100n+50

8 0

3 years ago

Plz help me with this

Vanyuwa [196]

Answer: x = 4

Step-by-step explanation:

6ˣ = 1296

6ˣ = 6⁴

Since they have the same base, set the exponents equal to each other:

x = 4

4 0

3 years ago