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3 years ago

PLEASE HELP!! I NEED ANSWER ASAP!!! (The directions are to Find the area of the Circle.)

Mathematics

1 answer:

Maslowich3 years ago

3 0

1. Use the formula: A = π x r^2
2. Find the radius.
3. Multiply the radius by itself to square it.
4. Multiply the result by pi.
5. Use the result as your answer.

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- To make homemade window cleaner, Shivani combines vinegar and water in the ratio of 1:7 by volume. How

rewona [7]

V:W
1:7
1+7=8
1/8*45=5.625 ml of vinegar

8 0

3 years ago

it's believed that as many as 2222% of adults over 50 never graduated from high school. we wish to see if this percentage is t

jenyasd209 [6]

The given values are:

p = 22% = 0.22

Zc = 1.645 at 90% confidence level.

margin of error, E = 0.04

The formula we can use here is:

E = sqrt(pq/n) * Zc

0.04 = sqrt(0.22*(1-0.22)/n)*1.645

n = (0.22*(1-0.22))*(1.645/0.04)^2

n = 290.22

hence minimum sample size = 290

7 0

3 years ago

Could you please help me with number

Anarel [89]

Too blury,take a good pic

6 0

3 years ago

The mosquito population is a function of rainfall, and can be approximated by the formula N(x)=−x3+45x2+1000 where x is the numb

KiRa [710]

Answer:

Therefore the population will be maximum when x=30 inches.

Step-by-step explanation:

Given that, the mosquito population is a function of rainfall and can be approximated by the formula

$N(x)= -x^3+45x^2+1000$

where x is the number of inches of rainfall.

$N(x)= -x^3+45x^2+1000$

Differentiating with respect to x

$N'(x)= -3x^2+90x$

Again differentiating with respect to x

$N''(x)=-6x+90$

Now we set N'(x)=0

$-3x^2+90x=0$

$\Rightarrow -3x(x-30)=0$

$\Rightarrow x=0,30$

$N''(0)=-6.0+90=90>0$

$N''(30)=-6.30+90=-90$

Since at x=30, N''(x)<0, So at x=30, N(x) has maximum value.

Therefore the population will be maximum when x=30 inches.

5 0

3 years ago

Solve 2(x+3)3/2=54 x = <br>show your work

hjlf

Answer:

x=15

Step-by-step explanation:

Step 1: Multiply both sides by 2.

Step 2: Simplify both sides of the equation.

6x+18=108

Step 3: Subtract 18 from both sides.

6x+18−18=108−18

6x=90

Step 4: Divide both sides by 6.

x=15

6 0

3 years ago