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3 years ago

8

The Zamboni can resurface 1200 square feet per minute. How many minutes will it take the Zamboni to resurface the entire rink if

its dimensions are:
a. 80 ft X 300 ft?

b. 75 ft X 160 ft?

c. 100 ft X 210 ft?

1 answer:

Alekssandra [29.7K]3 years ago

7 0

Answer:

b

Step-by-step explanation:

sorry if wrong

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Find f (0) and find x when f (x) =4

Anuta_ua [19.1K]

At x = 0, y-coordinate is at -4 so that means f(0) = -4

Now for f(x) = 4, we need to find any x-coordinates such that y-coordinates is 4.

There are two possible answer: x = -8 and x = 8

So x = -8, 8

Hope this helps.

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3 years ago

The gravitational force exerted by the planet Earth on a unit mass at a distance r from the center of the planet is:

jolli1 [7]

Answer:

Yes, F is a continuous function of r

Step-by-step explanation:

We are given that

When r<R

$F(r)=\frac{GMr}{R^3}$

$r\geq R$

$F(r)=\frac{GM}{r^2}$

Where M=Mass of the earth

R=Radius of earth

G=Gravitational constant

We have to find the function is continuous of r or not.

LHL

$\lim_{r\rightarrow R-}\frac{GMr}{R^3}=\frac{GMR}{R^3}=\frac{GM}{R^2}$

RHL

$\lim_{r\rightarrow R+}\frac{GM}{R^2}=\frac{GM}{R^2}$

$F(R)=\frac{GM}{R^2}$

When a function is continuous at x=a

Then, LHL=RHL=f(a)

RHL==LHL=F(R)

Hence, the function is continuous of r.

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3 years ago

Mrs.mayfields class sold a total of 7293 lollipops for 2.00 each they bought the lollipops for 1.00 each. how much profit did th

Akimi4 [234]

$7293 I think....

7293 x 2 = 14586 / 2 = 7293

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3 years ago

What is 25.5n - 3 = 5.5n + 10.

klemol [59]

N = 13/20 or 0.65

25.5n - 3 = 5.5n + 10

Add 3 to both sides of the equation.

25.5n = 5.5n + 13

Subtract 5.5n from both sides.

20n = 13

Divide both sides by 20.

n = 13/20 or 0.65

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3 years ago

Solve the equation using the distributive property and properties of equality.

user100 [1]

Answer:

a=8

Step-by-step explanation:

-5(a+3)=-55

So we multiply -5 times a and 3 so we get:

-5a-15=-55

+15 +15

____________-

-5a=-40

÷-5 ÷-5

____________

a=8

Hope this helped :D

8 0

3 years ago

Read 2 more answers