1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
koban [17]
3 years ago
14

Earth's oceans have an average depth of 3800 m, a total area of 3.63 × 108 km2, and an average concentration of dissolved gold o

f 5.8 × 10−9 g/L. If a recent price of gold was $129.00/troy oz, what is the value of gold in the oceans?
Mathematics
1 answer:
Phoenix [80]3 years ago
3 0

Answer:

value of gold is $33.17

Step-by-step explanation:

given data

depth d = 3800 m = 3.8 km

area A  = 3.63 × 10^8 km²

average concentration = 5.8 × 10^−9 g/L

price of gold = $129.00 / troy oz

to find out

value of gold

solution

first we find volume that is

volume v = A× d

put here value

volume = 3.8 ×  3.63 × 10^8

volume =  13.794 × 10^{8} km³

volume = 137.94 × 10^{19} L

so mass =  5.8 × 10^{9} × 137.94 × 10^{19}

mass = 8 × 10^{12} g

mass = 0.2572 troy oz

here we know 1 troy oz = 31.1 g

and we know 1 troy oz = $129

so 0.2572 troy oz = 129 × 0.2572

0.2572 troy oz value is $33.17

value of gold is $33.17

You might be interested in
Which of the following is the product of the rational expression 1/x+2 × x/x-2
pav-90 [236]

Answer:

the answer of your question

\frac{1}{x + 2}  \times  \frac{x}{x - 2}  =  \frac{x}{x ^{2}  - 4}

6 0
3 years ago
Find the parabola through
Anni [7]

Answer:

y = - 3x² - 24x - 60

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (- 4, - 12 ), thus

y = a(x + 4)² - 12

To calculate a substitute (- 7, - 39) into the equation

- 39 = a(- 7 + 4)² - 12 ( add 12 to both sides )

- 27 = 9a ( divide both sides by 9 )

- 3 = a

y = - 3(x + 4)² - 12 ← in vertex form

Expand (x + 4)²

y = - 3(x² + 8x + 16) - 12

   = - 3x² - 24x - 48 - 12

y = - 3x² - 24x - 60 ← in standard form

   = - 3(x²

3 0
3 years ago
Howmany days are their in a year
ra1l [238]
365 days are in a year
4 0
3 years ago
Read 2 more answers
In the figure, AB is parallel to CD, XY is the perpendicular bisector of AB, and E is the midpoint of XY. Prove that △AEB ≅ △DEC
Makovka662 [10]

Answer:

From top to bottom:

A, J, E, B, I, C, D, G, F, H

See below for more clarification.

Step-by-step explanation:

We are given that AB is parallel to CD, XY is the perpendicular bisector of AB, and E is the midpoint of XY. And we want to prove that ΔAEB ≅ ΔDEC.

Statements:

1) XY is perpendicular to AB.

Definition of perpendicular bisector.

2) XY ⊥ CD.

In a plane, if a transveral is perpendicular to one of the two parallel lines, then it is perpendicular to the other.

3) m∠AXE = 90°, m∠DYE = 90°.

Definition of perpendicular lines.

4) ∠AXE ≅ ∠DYE.

Right angles are congruent.

5) XE ≅ YE

Definition of a midpoint.

6) ∠A ≅ ∠D.

Alternate Interior Angles Theorem

7) ΔAEX ≅ ΔDEY

AAS Triangle Congruence*

(*∠A ≅ ∠D, ∠AXE ≅ ∠DYE, and XE ≅ YE)

8) AE ≅ DE

Corresponding parts of congruent triangles are congruent (CPCTC).

9) ∠AEB ≅ ∠DEC

Vertical Angles Theorem

10) ΔAEB ≅ ΔDEC

ASA Triangle Congruence**

(**∠A ≅ ∠D, AE ≅ DE, and ∠AEB ≅ ∠DEC)

3 0
3 years ago
How do you write 79% as a fraction or whole number in simplest form?
Nikolay [14]
79% = 0.79= 79/100
(not sure if this is what you meant?)

4 0
3 years ago
Read 2 more answers
Other questions:
  • How do I solve this equation q(a+y)=67y+93
    12·1 answer
  • The forest was 600 acres in size 2/5 had been ravaged by bushfire how many acres were affected by bushfire?
    9·2 answers
  • I need help on my homework .>. What's the median, first quartile, third quartile, and interquartile range for the numbers 14,
    12·1 answer
  • Find the square of the radical expression of 121
    11·1 answer
  • William bought a hockey stick for $50. What was the TOTAL COST after a 14% tax was added?
    14·2 answers
  • Solve
    10·1 answer
  • LEGIT ANSWERS ONLY!!
    11·2 answers
  • Share £26 amongst three people in the ratio 6:3:4
    12·1 answer
  • Tap me please thanksvjbjgsxjhex
    9·1 answer
  • What is x? -8=-(x+4)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!