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3 years ago

Pls help me. A scuba diver descends 63 feet in 18 seconds.

Mathematics

2 answers:

Nastasia [14]3 years ago

8 0

-3.5 because 63 divided by 18 equals 3.5 and you are descending so it’s negative

EleoNora [17]3 years ago

3 0

Answer:

idk

Step-by-step explanation:

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The following are the ages (years) of 5 people in a room:

MA_775_DIABLO [31]

Answer:

The person is 14 years old

Step-by-step explanation:

1. Multiply 6 times 18 which is 108

2. Add all numbers together in list which is 94

3. Subtract 94 from 108 which is 14

4. To check answer add 94 plus 14 and divide by 6 and you will get the median which is 18, now you know this answer is correct.

8 0

3 years ago

Determine whether each of the following sequences are arithmetic, geometric or neither. If arithmetic, state the common differen

PilotLPTM [1.2K]

$\qquad\qquad\huge\underline{{\sf Answer}}$

$\textbf{Let's see if the sequence is Arithmetic or Geometric :}$

$\textsf{If the ratio between successive terms is }$ $\textsf{equal then, the terms are in GP}$

$\sf{ \dfrac{12}{-4} = -3}$

$\sf{ \dfrac{-36}{12} = -3}$

$\textsf{Since the common ratio is same, }$ $\textsf{we can infer that it's a geometric progression}$ $\textsf{with common ratio of -3}$

3 0

2 years ago

Read 2 more answers

Use spherical coordinates. Find the volume of the solid that lies within the sphere x^2 + y^2 + z^2 = 81, above the xy-plane, an

Natasha_Volkova [10]

Answer:

The volume of the solid is 243 $\sqrt{2} \ \pi$

Step-by-step explanation:

From the information given:

BY applying sphere coordinates:

0 ≤ x² + y² + z² ≤ 81

0 ≤ ρ² ≤ 81

0 ≤ ρ ≤ 9

The intersection that takes place in the sphere and the cone is:

$x^2 +y^2 ( \sqrt{x^2 +y^2 })^2 = 81$

$2(x^2 + y^2) =81$

$x^2 +y^2 = \dfrac{81}{2}$

Thus; the region bounded is: 0 ≤ θ ≤ 2π

This implies that:

$z = \sqrt{x^2+y^2}$

ρcosФ = ρsinФ

tanФ = 1

Ф = π/4

Similarly; in the X-Y plane;

z = 0

ρcosФ = 0

cosФ = 0

Ф = π/2

So here; $\dfrac{\pi}{4} \leq \phi \le \dfrac{\pi}{2}$

Thus, volume: $V = \iiint_E \ d V = \int \limits^{\pi/2}_{\pi/4} \int \limits ^{2\pi}_{0} \int \limits^9_0 \rho ^2 \ sin \phi \ d\rho \ d \theta \ d \phi$

$V = \int \limits^{\pi/2}_{\pi/4} \ sin \phi \ d \phi \int \limits ^{2\pi}_{0} d \theta \int \limits^9_0 \rho ^2 d\rho$

$V = \bigg [-cos \phi \bigg]^{\pi/2}_{\pi/4} \bigg [\theta \bigg]^{2 \pi}_{0} \bigg [\dfrac{\rho^3}{3} \bigg ]^{9}_{0}$

$V = [ -0+ \dfrac{1}{\sqrt{2}}][2 \pi -0] [\dfrac{9^3}{3}- 0 ]$

V = 243 $\sqrt{2} \ \pi$

4 0

3 years ago

Find the interest of a $2,500 loan, with an interest rate of 7% compounded annually over

Ksenya-84 [330]

Interest = Principle(Rate)(Time)
2500(.07)(6) = 1050

The interest will be $1,050

3 0

3 years ago

Check thepic plzz first answer brainliest

aleksandr82 [10.1K]

Answer:

Total Surface Area: A = 88 square cm

Step-by-step explanation:

Volume V = 48 cubic cm

So this cuboidal box is actually a rectangular prism.

V = L * W* H

L = length, W = breadth, H= height

With L: W : H = 3: 2: 1

L:W = 3: 2

W: H = 2: 1

L/W = 3/2, L = (3/2)*W

W/H = 2/1 , W = 2*H

L = (3/2)*(2H) = 3H

So : V = L * W * H = (3H) * (2H) * H = 6 * H^3

48 = 6 * H^3

48/6 = 8 = H^3

H = cube-root(8) = 2 cm

so ...

W = 2*H = 2*2 = 4 cm

L = (3/2)*W = (3/2)* 4 = 6 cm

Total Surface Area: A = 2*LW + 2*LH + 2*WH

A = 2*(6 * 4) + 2*(6 * 2) + 2*(4 * 2)

A = 2*24 + 2*12 + 2*8

A = 48 + 24 + 16

A = 48 + 40

A = 88 square cm

4 0

3 years ago