A certain alloy contains 5.25% copper. How much copper is there in a piece weighing 200 pounds?

Answers

Answer 1

Answer:

There are 10.5 pounds of copper in a piece weighing 200 pounds.

We have,

The concept used to calculate the amount of copper in a piece weighing 200 pounds is the concept of percentage.

Now,

5.25 pounds of copper is to 100 pounds of alloy as x pounds of copper is to 200 pounds of alloy.

To determine the amount of copper in a piece weighing 200 pounds, we need to calculate 5.25% of 200 pounds.

To do this, we multiply 5.25% (or 0.0525) by 200:

0.0525 * 200 = 10.5

Therefore,

There are 10.5 pounds of copper in a piece weighing 200 pounds.

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Answer 2

Answer:

The 200-pound piece of alloy contains 10 and a 1/2 pounds of copper.

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$4 is what percent of $50

Answers

it is 8 percent of 50.

This is 1 way-
4/50=%/100 You now have a proportion. Cross multiply.
50%=400 Replace % with any variable.
50x=400 Now divide both sides of the equation by 50.
x=8

(% is basically the percentage of 4 of 50 over 100. its much easier to solve percentage problems when the percentages are over 100. 100 represents a full percentage.
example- 4 of 100 is 4% of 100)

2nd example-
Since the percentage can be found if over 100 as well (%/100), and since 100 is a multiple of 50, we can do 4 of 50 (which would look like 4/50) and multiply both numbers by 2 to get the percentage. These are our steps:

4/50× 2/2=
8/100

Therefore, 4 of 50 is 8% of 50

Simplify the expression fraction with numerator of the square root of negative one and denominator of the quantity three plus eight times i minus the quantity two plus five times i.fraction with numerator x-3 plus i and denominator 10
fraction with numerator negative 3 plus i and denominator 10
fraction with numerator 3 minus i and denominator 10
fraction with numerator negative 3 minus i and denominator 10

Answers

The simplified expression is: $\mathbf{(i+13)/(170)}$

The fraction is given as:

$\mathbf{(√(-1))/(3 +8i -2 + 5i)}$

Collect like terms

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (√(-1))/(3 -2+8i + 5i)}$

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (√(-1))/(1+13i)}$

In complex numbers, we have:

$\mathbf{i =√(-1)}$

So, we have:

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (i)/(1+13i)}$

Rationalize

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (i)/(1+13i) * (1-13i)/(1-13i)}$

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (i(1-13i))/(1^2-(13i)^2)}$

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (i-13(-1))/(1-169(-1))}$

$\mathbf{(√(-1))/(3 +8i -2 + 5i) = (i+13)/(170)}$

Hence, the simplified expression is: $\mathbf{(i+13)/(170)}$

Answers

Answer:

11,000

Step-by-step explanation:

The kl is a kiloliter.

10 milliliter makes a centiliter, 10 centiliter makes a deciliter and 10 deciliter makes a liter.

10 liters (l) make a decaliter, 10 decaliter makes a hectoliter and 10 hectoliter makes a kiloliter (kl).

As such, 1000 l = 1kl

11kl = 11 × 1000l

= 11,000l

the answer is 11,000

Jim uses ribbon for bookmarks. Jim has 9 feet of ribbon. He uses 1/3 foot of ribbon to make each bookmark. What is the total number of ribbons Jim can make from 9 feet of ribbon?

Answers

Answer with explanation:

Total Length of Ribbon = 9 feet

Length of Ribbon used to make bookmark $=(1)/(3)$ foot

Total number of ribbons Jim can make from 9 feet of ribbon

$=\frac{\text{Total Length of Ribbon}}{\text{Length of ribbon used to make bookmark}}\n\n=(9)/((1)/(3))\n\n=9 * 3=27$

=27 Ribbons

there is 12 inches in a foot. 1/3 of a foot would be 4 inches

take 9 x 12 (Inches in a foot) = 108 and divide by four

the answer is 27. so he can get 27 ribbons out of 9 ft. of ribbon

A merchant buys an old carpet for $25.00. He spends $15.00 to have it restored to goodcondition and then sells the rug for $50.00. What is the percent proﬁt on his total
investment?

Answers

The percent proﬁt on his total 20%.

What is Unitary method?

It is a method where we find the value of a single unit from the value of multiple units and the value of multiple units from the value of a single unit.

Steps to Use Unitary Method

First, let us make a note of the information we have. There are 5 ice-creams. 5 ice-creams cost $125.

Step 1: Let’s find the cost of 1 ice cream. In order to do that, divide the total cost of ice-creams by the total number of ice-creams. The cost of 1 ice-cream = Total cost of ice-creams/Total number of ice-creams = 125/5 = 25. Therefore, the cost of 1 ice cream is $25.
Step 2: To find the cost of 3 ice-creams, multiply the cost of 1 ice cream by the number of ice-creams. The cost of 3 ice-creams is cost of 1 ice-cream × number of ice-creams = 25 × 3 = $75. Finally, we have the cost of 3 ice-creams i.e. $75.

Given:

Cost of old carpet =$25

He spends $15.00 to have it restored

So, he spend= 25+ 15 = 40

He sells it at = $50

Profit= 50-40 = 10

Profit %= P/ CP * 100

Profit % = 10/ 25 * 100

Profit %= 25% on CP

and, P% on selling price= 10/50* 100 = 20%

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$25-how much it cost
+$15- restored
Total of $35 spend
$50 earned
- 35 what he spend
Total of 15$
To get the percent u divide 35 by 50=0.7 x100
The profit is 70%

Brainliest to whoever gets this correct!