The radius of a spherical ball is increasing at a rate of 2 cm/min. At exactly what rate (in cm2/min) is the surface area of the ball increasing when the radius is 9 cm?

Answer:

She should receive $30.86

Step-by-step explanation:

$7.05 + $8.12 + $3.97 =19.14

50 - 19.14 = 30.86

Using the subtraction method we have found that Hannah will receive the change of $30.86

Subtraction is an arithmetic operation that represents the operation of removing objects from a collection

Total cost of three items =7.05 + 8.12 + 3.97 =$19.14

She paid $50 bill

Change that Hannah should receive is =50 - 19.14 = $30.86

Hence, change that Hannah should receive is$30.86

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Answer:

B.

Step-by-step explanation:

Answer:

The answer is percentages

Step-by-step explanation:

I got it right on a quiz

Answer:

Times, and conquer.

Step-by-step explanation:

First half the picture, for the circle and square. so we know the base is 28m, and the length including the circle is 24. So now times the two numbers and bam your answer.

Answer:

Step-by-step explanation:

250*30%=75 mark up

250+75 markup = 325 selling price

As per cubic equation, there will be one real solution of the given equation.

"A cubic equation is an algebraic equation of degree three and is of the form ax³ + bx² + cx + d = 0. x is a variable.

Here a, b and c are the coefficients and d is the constant"

Given cubic equation is:

x³ + 6x² + 12x + 8 = 0

⇒ x²(x + 2) +4x(x + 2) + 4(x + 2) = 0

⇒ (x + 2)(x² + 4x + 4) = 0

⇒ (x + 2)(x + 2)²  = 0

⇒ (x + 2)³ = 0

⇒ x = -2

There will be one real solution of the given equation.

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Answer:

833.29  

Just work it out on a piece of paper.

Answer:

I think it is x=-78

Step-by-step explanation:

Learned it in math class :)

Answer:

I think they are asking the area of the triangle so we are going with that.

Step-by-step explanation:

Easiest way to do this is find the area of the incomplete square, and then cut that in half for the triangle.

so it is 4 cm wide

and 8 cm tall

length x width = area

8 x 4 = 32

32/2 = 16

So your answer should be 16 cm

Let R be region in the xy-plane and β>0 be the constant. What is the region R that will minimize the value of integral (x² + y² - β²).

i.e.

[tex]\int \int _R (x^2 +y^2 - \beta^2) \ dA[/tex]

Answer:

0

Step-by-step explanation:

Given that:

[tex]\int \int _R (x^2 +y^2 - \beta^2) \ dA[/tex]

where;

R is the region in the xy-plane.

To minimize our double integral, we have to determine the region over which the function we are integrating has a negative value.

x² + y² - β²  ≤ 0 ; where β > 0 is a constant

x² + y²  ≤ β² is the  circle with center (0,0)

Radius "β" because  R: x² + y²  ≤ β²

The polar coordinates: x = rcosθ and y = rsinθ

x² + y² = r²

⇒ r limits : r = 0 → β

⇒ θ limits : r = 0 → 2π

[tex]\iint_R(x^2+y^2-\beta^2) \ dA =\int\limits ^{2 \pi}_{\theta=0} \int \limits ^{\beta}_{r=0}( \beta^2 -\beta^2) \ rd \ rd\ \theta[/tex]

[tex]\int \int _R (x^2 +y^2 - \beta^2) \ dA[/tex] = 0

Answer:

y=5x

Step-by-step explanation:

x-months

y-books read

5*x = y

Answer:

no no yes yes

Step-by-step explanation:

Answer:

its 2 homie

Step-by-step explanation:

1+1 equals 2 one thing plus another equals the next number.

Answer:

9

Step-by-step explanation:

2√x+1=7

2√x=6

√x=3

x=9

Answer:

You multiply 37.5*2 to get 75.

Step-by-step explanation:

i got 8%

Amount of markup:

70.20 −65.00= 5.20

Markup as a percentage of original price

5.20/65.00 x 100 = 8

Answer:

x ≥ -2

Step-by-step explanation:

Answer:

40 - 10w

Step-by-step explanation:

Answer:

8 + 5 + 7 =20

Step-by-step explanation:

Answer:

8.70

Step-by-step explanation:

Answer:

the price for per dozen would $5.80 I hope this is right

Step-by-step explanation:

you multiply $2.90 by 2 because the muffins are 2.90 for 6 muffins so if you add 6 on it would be a dozen so all you have to do it multiply 2.90 by 2 please tell me if this is correct or wrong if it is wrong i will change it to the correct answer thank you

Their is your answer hope i get a like

Answer:

The plane is traveling at 160 km/h

Step-by-step explanation:

This is because if the first plane is traveling at 160 and flies for 5 hours it'll travel 800 km. then the second plane will have to catch up in 4 hours since it left an hour late, this means traveling at 160 km with an extra 40 km in 4 hours will get it to the first plane at 800 km in the 4 hours given

Answer:

3) 2 and 2/9

4)  1 and 1/9

Step-by-step explanation:

Answer:

you couldve put it here -.-

Step-by-step explanation:

Answer:

Step-by-step explanation:

Area of the land A - Length * Width

Given

A = 1 3/4 mi²

Length L = 2 1/3 miles

Required

Width of the property

Substitute into the formula;

A = LW

W = A/L

W = 1 3/4/(2 1/3)

W = 7/4 ÷ 7/3

W = 7/4 × 3/7

W = 3/4 miles

Hence the width of the property is 3/4 miles

Answer:

'

Step-by-step explanation:

'

Answer:

Step-by-step explanation:

(0,-2)

Answer:

No, a reasonable estimate is around 6 times $7 = $42

Step-by-step explanation:

$6.99 is rounded up to 7, and there are 6 people who ordered a $7 meal. And 6 times 7 is 42

Answer:

Step-by-step explanation:

f(n + 1) = f(n) + 2.5

f(1) = -10

f(2) = f(1) + 2.5 = -10 + 2.5 = -7.5

f(3) = f(2) + 2.5 = -7.5 + 2.5 = -5

f(4) = f(3) + 2.5 = -5 + 2.5 = -2.5

Answer:

7.5

Step-by-step explanation:

12.5/10=1.25

7.5/6=1.25

Answer:

Store A has a better deal

Step-by-step explanation:

Answer:

Store A has the better deal

Step-by-step explanation:

People would see that 7 pounds of bananas is worth 7$ and would buy from store A instead of store B for selling a lesser amount for almost the same price.