All categories

3 years ago

The radius of a sphere is 3 inches. Which represents the volume of the sphere?

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

6 0

Answer:

113.1

Step-by-step explanation:

V=4/3π(r)^3

V=4/3π(3)^3

V=4/3(27)π

V=36π ---> 113.1

You might be interested in

5 and 1/6 - 7 and 1/3 = _______

Vera_Pavlovna [14]

Answer:

-2 and 1/6

Step-by-step explanation:

you would first make both mixed numbers into improper fractions( 31/6-22/3). the you would find a common denomonator for both. (which is 6) then you solve.(31/6-44/6) and you get -13/6. then you can change it back to a mixed number -2 and 1/6

8 0

4 years ago

Jenna runs 5 miles everyday. She averages 4.5 miles per hour. How many ft/sec does she travel? Round to the nearest tenth.

ioda

Answer:

She travel 6.6 ft/sec

Step-by-step explanation:

Jenna runs 5 miles everyday.

She averages 4.5 miles per hour

Now we are supposed to find How many ft/sec does she travel

1 mile =5280 feet

1 hour = 3600 seconds

Now convert the given speed in feet per second using conversion

So, speed in feet/sec= $4.5 \times \frac{5280}{3600}$

So, speed in feet/sec=6.6 ft/sec

So, She travel 6.6 ft/sec

8 0

3 years ago

Let f(x) = x2 − 81. Find f−1(x).

Umnica [9.8K]

F(x) = x² - 81

Finding f⁻¹(x) the inverse function

Let y = f(x) and solve for x.

y = x² - 81

y + 81 = x²

x² = y + 81

x = √(y + 81)

Recall f(x) = y, that means x = f⁻¹(y)

x = √(y + 81)

f⁻¹(y) = √(y + 81)

Therefore f⁻¹(x) = √(x + 81)

3 0

3 years ago

You have two jobs. You earn $8 for each hour x that you work as a restaurant host and $6 for each hour y that you work as a hair

Yanka [14]

SOLUTION:

a ) Write an equation in standard form that models your earnings.

8x + 6y = $114

b ) You worked 10 hours as a hair washer. How many hours did you work as a host?

8x + 6y = $114

8x + 6 ( 10 ) = 114

8x + 60 = 114

8x = 114 - 60

8x = 54

x = 54 / 8

x = 27 / 4 hours

x = 6.75 hours

x = 6 hours and 45 minutes

3 0

4 years ago

Quadriatic formula 2w^2-28w=-98

alina1380 [7]

To apply the quadratic formula, the right side must be equal to 0.

$2w^2-28w=-98 \\ 2w^2-28w+98=0$

Now you can apply the quadratic formula $\frac{-b\±\sqrt{b^2-4ac}}{2a}$ to find the solution for w.

$\frac{-(-28)\±\sqrt{(-28)^2-4(2)(98)}}{2(2)} = \frac{28\±\sqrt{784-784}}{4} = \frac{28}4 = \boxed{7}$

(The quadratic formula is highly unnecessary in this problem, however. You could easily divide all values by 2 to get w²-14w+49=0, which factors into (w-7)²=0, for which 7 is the only solution which puts a factor of the quadratic equal to 0.)

4 0

3 years ago

Read 2 more answers