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4 years ago

I need the answer ASAP please. (look at the picture above)^^^

Mathematics

1 answer:

Damm [24]4 years ago

8 0

OMG! I wish I still had this math! You see if each second the rock goes 5 feet away from the surface. After 4 seconds it will have been 20 feet below the surface. But if Lisa dropped it 5 feet above the surface than after 4 seconds the rock would be 25 feet below the surface.

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Item 16 A sphere has a radius of 8 centimeters. A second sphere has a radius of 2 centimeters. What is the difference of the vol

Zigmanuir [339]

Answer:

$672\pi \text{ cm}^3$ .

Step-by-step explanation:

We have been given that a sphere has a radius of 8 centimeters. A second sphere has a radius of 2 centimeters. We are asked to find the difference of the volumes of the spheres.

We will use volume formula of sphere to solve our given problem.

$\text{Volume of sphere}=\frac{4}{3}\pi r^3$ , where r is radius of sphere.

The difference of volumes would be volume of larger sphere minus volume of smaller sphere.

$\text{Difference of volumes}=\frac{4}{3}\pi(\text{8 cm})^3-\frac{4}{3}\pi(\text{2 cm})^3$

$\text{Difference of volumes}=\frac{4}{3}\pi(512)\text{ cm}^3-\frac{4}{3}\pi(8)\text{ cm}^3$

$\text{Difference of volumes}=\frac{4}{3}\pi(512-8)\text{ cm}^3$

$\text{Difference of volumes}=4\pi(168)\text{ cm}^3$

$\text{Difference of volumes}=672\pi\text{ cm}^3$

Therefore, the difference between volumes of the spheres is $672\pi \text{ cm}^3$ .

3 0

4 years ago

Please help me, I don’t understand how I keep getting it wrong!

GenaCL600 [577]

9514 1404 393

Answer:

1.2 t/m³

Step-by-step explanation:

1 tonne is 1 Mg = 10⁶ g

1 m³ is (100 cm)³ = 10⁶ cm³

The conversion is ...

(1.2 g/cm³) · (1 t)/(10⁶ g) · (10⁶ cm³)/(1 m³)

= 1.2(10⁶)/(10⁶) t/m³

= 1.2 t/m³

For this conversion, the numerical value does not change. Megagrams per cubic meter is the same ratio as grams per cubic centimeter.

6 0

3 years ago

What is this I have been on it fourever

Yuki888 [10]

Answer:

$\frac{3}{4}$ = $\frac{9}{12}$

Step-by-step explanation:

The values are in proportion if the right side is a multiple of the left side

Consider

$\frac{3}{4}$ × $\frac{3}{3}$

= $\frac{3(3)}{4(3)}$

= $\frac{9}{12}$

Thus $\frac{3}{4}$ and $\frac{9}{12}$ are in proportion

This does not happen for any of the other three.

3 0

3 years ago

A car passes through an intersection at 45.0 mi/h and then passes through another intersection at 30.0 mi/h. Determine the avera

aleksandr82 [10.1K]

37.5 mi/h 45+30=75. 75/2=37.5 mi/h average

5 0

3 years ago

emilio had $150 on a gift card he used the gift card to purchase 8 dvds. adam had $175 on a gift card and used the gift card to

Artyom0805 [142]

150 - 8d = 175 - 10d
-8d + 10d = 175 - 150
2d = 25
d = 25/2
d = 12.5...so each dvd costs 12.50

150 - 8(12.5) = 150 - 100 = 50
175 - 10(12.5) = 175 - 125 = 50

so they will each have 50 bucks left on their card

7 0

4 years ago