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LiRa
2 months ago
9

An element with mass 210 grams decays by 8.3% per minute. How much of the element is remaining after 15 minutes, to the nearest

10th of a gram?
Mathematics
1 answer:
PIT_PIT [12.4K]2 months ago
0 0

Answer:

57.2 g

Step-by-step explanation:

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HELP PLEASE!
Zina [12379]

Answer:

Option 2  50 ≤ s ≤ 100

Option 5 She can make a deposit of $50

Option 6 She can make a deposit of $75

Detailed explanation:

Let

s represent the amount of money Layla puts into her savings account.

We know that

25% = 25/100 = 0.25

50% = 50/100 = 0.50

Thus

s\geq 0.25*200 -----> s\geq \$50

s\leq 0.50*200 -----> s\leq \$100

The compound inequality is

\$50 \leq s\leq \$100

Check each case

case 1) 25 ≤ s ≤ 50

This statement is false

Refer to the procedure

case 2) 50 ≤ s ≤ 100

This statement is true

Refer to the procedure

case 3) s ≤ 25 or s ≥ 50

This statement is false

Because s ≤ 100 and s ≥ 50

case 4) s ≤ 50 or s ≥ 100

This statement is false

Because s ≤ 100 and s ≥ 50

case 5) She can make a deposit of $50

This statement is true

As the value of s meets the compound inequality  \$50 \leq s\leq \$100

case 6) She can make a deposit of $75

This statement is true

As the value of s meets the compound inequality  \$50 \leq s\leq \$100

3 0
1 month ago
Read 2 more answers
Yolanda is buying supplies for school. She buys n package of pencils at $1.40 per package and m pads of paper at $1.20 each. Wha
Inessa [12570]

To tackle this issue, we need to clarify what each variable stands for. Here, n indicates the number of pencil packages purchased by Yolanda, while m represents the number of paper pads she buys. We calculate the total cost by multiplying these variables by their individual prices, which helps us determine the expense for both pencil packages and pads of paper.

The expression "1.4n" indicates the overall cost for n pencil packages.

On the other hand, "1.2m" signifies the complete expense for m pads of paper.

As we sum these two expressions, the resulting total reflects the overall expenditure for both items.

The equation "1.4n + 1.2m" summarizes this calculation.

I hope this provides clarity!

8 0
2 months ago
Farmer Alex has 32 llamas each of whom needs 10000 square feet of grazing area. He wants to enclose a rectangular pen along a st
tester [12383]
Take note of the image below

the riverbank requires no fencing due to the river's presence
so the pen's perimeter can be calculated as 2w + l, or w + w + l
thus   \bf \textit{area of a rectangle}\\\\
A=lw\qquad A=10000\implies 10000=lw\implies \cfrac{10000}{w}=\boxed{l}
\\\\\\
\textit{perimeter of enclosed pen}\\\\
P=2w+l\implies P(w)=2w+\boxed{\cfrac{10000}{w}}

derive P(w), set it to zero, locate any critical points, and perform a first-derivative test for minimum values.

8 0
2 months ago
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Please help! Tim and Jane both work at a company that sells boxes of breakfast cereal. The boxes of cereal cost £3.00 and the am
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Jane must lower the price by 20%
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