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Ad libitum [116K]
2 years ago
14

I need to know the start value:)

Mathematics
1 answer:
RUDIKE [14]2 years ago
3 0

Answer:

5.6 i think :)

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An element with a mass of 630 grams decays by 30% per minute. To the nearest minute, how long will it be untill there are 30 gra
nataly862011 [7]

Answer:

It should take somewhere between 8 to 9 minutes to decay until there are 30 grams remaining.

6 0
3 years ago
In Andrew’s Furniture Shop, he builds bookshelves and tables. Each type of furniture takes him about the same time to make. He f
olasank [31]
Given:
Cost to build a bookshelf = $20
Cost to build a table = $45
Amount available to spend = $600

Let x =  number of bookshelves built.
Let y =  number of tables built.

The total number of bookshelves and tables =  18.
Therefore
x + y = 18.
 That is,
 y = 18 - x                    (1)

The total amount available to build x bookshelves and y tables = $600. Therefore
20x + 45y = 600
That is (dividing through by 5),
4x + 9y = 120            (2)

Substitute (1) into (2).
4x + 9(18 - x) = 120
4x + 162 - 9x = 120
-5x = -42
  x = 8.4
From (1),obtain
 y = 18 - 8.4 = 9.6

Because we cannot have fractional bookshelves and tables, we shall test values of x=8, 9 and y=9,10 for profit

Note: The profit is $60 per bookshelf and $100 per table.
If x = 8, then y = 18-8 = 10.
The profit = 8*60 + 10*100 =  $1480

If x = 9, then y = 18-9 = 9.
The profit = 9*60 + 9*100 = $1440

The choice of 8 bookshelves and 10 tables is more profitable.

Answer: 8 bookshelves and 10 tables.
5 0
3 years ago
True or False: The range of a logarithmic function is always all real numbers.
Readme [11.4K]

Answer: true!

Step-by-step explanation: i do not know but true!

5 0
3 years ago
Read 2 more answers
I wrote an equation using parentheses and all four operations with an answer of 25 what might the equation have been
ddd [48]
25=
[{50 divided by 5} plus 3]times 2 -1=25
8 0
3 years ago
Please help. and Reduce to simpliest form. Thx <3
SCORPION-xisa [38]

Answer:

-11/8

Step-by-step explanation:

-7/8 - 1/2 = -11/8

3 0
3 years ago
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