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4 years ago

All the gold ever mined would fit into a single cube about how many feet on a side

1 answer:

8 0

<span>All the gold ever mined would fit into a single cube about 60 feet on a side.
</span>
A figure that is widely used by investors comes from Thomson Reuters GFMS, which produces an annual gold survey.

Their latest figure for all the gold in the world is 171,300 tonnes.

A cube made of 171,300 tonnes would be about 20.7m (68ft) on each side.

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A group of workers can plant 6 3/4 acres in 1 7/8 days. What is the unit rate in acres per day?

Sedaia [141]

Answer:

The answer is 3.6 acres per day

Step-by-step explanation:

To find the unit rate divide the number of acres by number of days

∴ Unit rate = $6\frac{3}{4}$ ÷ $1\frac{7}{8}$

= (6 × 4 + 3)/4 ÷ (1 × 8 + 7)/8 = 27/4 ÷ 15/8

= 27/4 × 8/15 = 18/5 = 3.6 acres per day

6 0

3 years ago

A farmer owns about 960 acres of land. If his farm is square, what would be the length of each side in miles, to the nearest ten

OLEGan [10]

It is given in the question that

A farmer owns about 960 acres of land. If his farm is square.

First we convert acres to miles square, and the conversion expression is

$1 acre=0.0015625 mi^2$

Therefore,

$960acres=960*0.0015625=1.5 mi^2$

Let the side length of the square be x miles .

And the formula of area of square is

$Area=side^2
\\
1.5=side^2
\\
side= \sqrt{1.5}=1.2 miles$

5 0

3 years ago

10 POINTS PLEASE HELPPPPPP!!!

Alexandra [31]

I'm guessing that this one is another complementary angle, so the equation should be 90- 30= (THE ANSWER VARIABLE). Again, complementary angles add up to 90 degrees.

6 0

3 years ago

The u.s. department of health and human services collected sample data for 772 males between the ages of 18 and 24. that sample

soldier1979 [14.2K]

The 99% confidence interval for the true mean is given by:

$\bar{x}\pm z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

where:

$\bar{x}$ is the sample mean = 69.7
$\sigma$ is the standard deviation = 2.8
$z_{\alpha/2}$ is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.

Therefore, the 99% confidence interval is:

$69.7\pm2.58\left( \frac{2.8}{\sqrt{772}} \right)=69.7\pm2.58(0.1008) \\ \\ =69.7-0.26\leq\mu\leq69.7+0.26 \\ \\ =69.44\leq\mu\leq69.96$

6 0

3 years ago

Read 2 more answers

Plz help me with this

Ksenya-84 [330]

hi!

so you're trying to find the value of <em>n</em>, I assume.

(n +2) / 5 = -3

n + 2 = -3 * 5

n + 2 = -15

n = -17

hope this helped!