All categories

2 years ago

Help please I’ll reward who answers 25 Points!!!

Mathematics

1 answer:

Andreas93 [3]2 years ago

6 0

The answer is the first one the second and the last

You might be interested in

W=6z/x solved for the variable z

Anna35 [415]

The answer would be z=wx/6

6 0

3 years ago

Multiply————-(b+12)^2

Talja [164]

Use Square of Sum: (a + b)^2 = a^2 + 2ab + b^2

b^2 + 2b * 12 + 12^2

Simplify 12^2 to 144

b^2 + 2b * 12 + 144

Simplify 2b * 12 to 24b

b^2 + 24b + 144

5 0

2 years ago

For a ride on a rental scooter , Keith paid an $8 fee to start the scooter plus 6 cents per minute of the ride. The total bill f

salantis [7]

Answer:

72 minutes!

Step-by-step explanation:

We can form the linear equation :

y = 0.06x + 8

y = 12.32

12.32 = 0.06x + 8

4.32 = 0.06 x

x = 72

tadah!

7 0

2 years ago

Use differentials to estimate the amount of paint needed to apply a coat of paint 0.07 cm thick to a hemispherical dome with dia

Mademuasel [1]

An hemispherical dome is half a sphere. If the diameter is 60 m, then the radius is 30 m.

We can use differentials to solve this problem because we are adding a thin layer to the original dome, so the volume of the dome in increased by a differential of itself.

This differential volume that the dome is increased is equal to the volume of the coat of paint.

The volume of the dome can be written as:

$\begin{gathered} V=\frac{4\pi}{3}r^3 \\ \frac{dV}{dr}=\frac{4\pi}{3}\cdot3r^2\Rightarrow dV=\frac{4\pi}{3}\cdot3r^2\cdot dr=4\pi r^2\cdot dr \end{gathered}$

Now, we can calculate dV as:

$\begin{gathered} dV=4\pi r^2\cdot dr \\ dV\approx4\cdot3.14\cdot(30m)^2\cdot0.07\operatorname{cm}\cdot\frac{1m}{100\operatorname{cm}} \\ dV\approx12.57\cdot900m^2\cdot0.0007m \\ dV\approx7.92m^3 \end{gathered}$

Answer: the paint needed for this coat is approximately 7.92 m^3

5 0

1 year ago

A publishing company has just published a new college textbook. Before the company decides the price at which to sell this textb

Kobotan [32]

Answer:b

Step-by-step explanation:

8 0

3 years ago