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3 years ago

How do you do this ?

Mathematics

1 answer:

salantis [7]3 years ago

5 0

You would need to find the area of which the irrigation would cover:
Area of a circle=pi*r^2
=300^2*pi
=90000pi ft^2
Hope this helps

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EMERGENCY PLEASE HELP (22 points)<br> Look at pic to see problem

Genrish500 [490]

Answer:

(-4, 7)

Step-by-step explanation:

x is found on the x axis its -4

to find y you go up to where the point bvb is it is located at positive 7

4 0

3 years ago

Read 2 more answers

Find S12 for geometric series: (-7.5) + 15 + (-30) + ...

kolezko [41]

Answer:

S12 for geometric series: (-7.5) + 15 + (-30) + ... would be: 10237.5

Step-by-step explanation:

Given the sequence to find the sum up-to 12 terms

$(-7.5) + 15 + (-30) + ...$

As we know that

A geometric sequence has a constant ratio 'r' and is defined by

$a_n=a_1\cdot r^{n-1}$

$\mathrm{Compute\:the\:ratios\:of\:all\:the\:adjacent\:terms}:\quad \:r=\frac{a_{n+1}}{a_n}$

$\frac{15}{\left(-7.5\right)}=-2,\:\quad \frac{\left(-30\right)}{15}=-2$

$\mathrm{The\:ratio\:of\:all\:the\:adjacent\:terms\:is\:the\:same\:and\:equal\:to}$

$r=-2$

$\mathrm{The\:first\:element\:of\:the\:sequence\:is}$

$a_1=\left(-7.5\right)$

$a_n=a_1\cdot r^{n-1}$

$\mathrm{Therefore,\:the\:}n\mathrm{th\:term\:is\:computed\:by}\:$

$a_n=\left(-7.5\right)\left(-2\right)^{n-1}$

$a_n=-\left(-2\right)^{n-1}\cdot \:7.5$

$\mathrm{Geometric\:sequence\:sum\:formula:}$

$a_1\frac{1-r^n}{1-r}$

$\mathrm{Plug\:in\:the\:values:}$

$n=12,\:\spacea_1=\left(-7.5\right),\:\spacer=-2$

$=\left(-7.5\right)\frac{1-\left(-2\right)^{12}}{1-\left(-2\right)}$

$=-7.5\cdot \frac{1-\left(-2\right)^{12}}{1+2}$

$\mathrm{Multiply\:fractions}:\quad \:a\cdot \frac{b}{c}=\frac{a\:\cdot \:b}{c}$

$=-\frac{-30712.5}{1+2}$ ∵ $\left(1-\left(-2\right)^{12}\right)\cdot \:7.5=-30712.5$

$=-\frac{-30712.5}{3}$

$=\frac{30712.5}{3}$

$=10237.5$

Thus, S12 for geometric series: (-7.5) + 15 + (-30) + ... would be: 10237.5

5 0

3 years ago

In 2006, there were 2,573 computer viruses and other security incident. During the next 7 years, the number of incidents increas

EleoNora [17]

Answer:

Total number of virus after 7yrs= 247484.7 virus

Step-by-step explanation:

Total number of virus after 7yrs = 2573(1+0.92)⁷ = 247484.7 virus

7 0

3 years ago

Help me find the answer

labwork [276]

Answer:

f(2) =8

Step-by-step explanation:

f(2) Is when n=2

f(2) = -5 *f(2-1) -7

f(2) = -5 *f(1) -7

We know that f(1) = -3

f(2) = -5 *-3 -7

= 15 -7

= 8

8 0

3 years ago

-12 plus what equals -0.75?<br>PLZZ HELP THIS IS DUE IN 10 MINS

hodyreva [135]

Answer:

-12 + 0.35

Step-by-step explanation:

i tried XD

3 0

2 years ago

Read 2 more answers